Bukhari

Hadith Commentary:
If garlic or onion is eaten after being cooked such that its odor no longer remains, then there is no harm in it, as is mentioned in the narration of Abu Dawud.

Hadith Commentary:
Although garlic or onion is mentioned in these hadiths, every vegetable that produces an unpleasant odor in the mouth is prohibited for use, such as radish and the like.
The reason for this is that there are angels in the mosque who are troubled by foul-smelling things, and at times, even the worshippers themselves become disturbed by this odor.
If the odor is removed by some means, then there is no harm in using them, as is mentioned in the hadith: if they are cooked and their unpleasant smell is eliminated, then they may be used.
(Sunan Abi Dawud, Al-At'imah, Hadith: 3827)
The smell of onion can be removed by cooking and adding vinegar.
If they are rubbed with salt and placed in the sun, and later lemon is squeezed over them, their odor is also eliminated.
And Allah knows best.

Hadith Commentary:
(1)
The mentioned hadith consists of two parts:
The first is the one narrated by Abdullah ibn Umar (radi Allahu anhu) regarding the Battle of Khaybar, and the second part, about which Imam Bukhari (rahimahullah) had some hesitation as to whether it is connected (mawsul) or disconnected (mursal), in which the mention of the pot (handiya) occurs.
Thus, these are two separate hadiths.
There is a gap of approximately seven years between the first and second hadith, because the Battle of Khaybar took place in the seventh year after Hijrah, and the incident of the pot occurred in the first year after Hijrah. The details of this are mentioned in Sahih Muslim, where it is stated that when the Messenger of Allah (sallallahu alayhi wa sallam) migrated to Madinah, he stayed at the house of Abu Ayyub (radi Allahu anhu), and Abu Ayyub used to arrange food and other necessities for him.
When the Messenger of Allah (sallallahu alayhi wa sallam) finished eating and sent back the remaining food, Abu Ayyub (radi Allahu anhu) would look for the traces of the Messenger of Allah’s (sallallahu alayhi wa sallam) fingers and eat from those places.
Once, he did not find the traces of the Messenger of Allah’s (sallallahu alayhi wa sallam) fingers in the food, so he realized that the Prophet had not eaten from it because garlic had been added to it.
Abu Ayyub (radi Allahu anhu) asked the Messenger of Allah (sallallahu alayhi wa sallam) whether it was forbidden (haram), to which he replied that it was not forbidden, but he disliked it because such things become an obstacle in communion with the angels.
From this detail, it is also understood that when the Messenger of Allah (sallallahu alayhi wa sallam) mentioned communion with “those,” he meant the angels, as is explicitly stated in Sahih Ibn Khuzaymah and Sahih Ibn Hibban, where the Messenger of Allah (sallallahu alayhi wa sallam) said: “You eat this food yourselves, for I am not like you.
I fear that by eating this food, my companions (the angels) may be harmed.”
(Sahih Ibn Khuzaymah: 3/88, and Sahih Ibn Hibban: 4/524, 525) (2)
Imam Bukhari’s (rahimahullah) teacher Sa’id ibn ‘Ufayr narrated the word “handiya” (pot), while his other teacher Ahmad ibn Salih narrated the word “badr” which means “tray,” as Imam Bukhari (rahimahullah) himself explained.
(Sahih al-Bukhari, Al-I’tisam bil-Kitab wa al-Sunnah, Hadith: 7359)
There too, Imam Bukhari (rahimahullah) expressed this hesitation, but Layth and Abu Safwan did not narrate this hadith (in which the pot is mentioned) at all.
The narration of Layth was mentioned by Imam Dhuhli in “Zuhriyyat,” while the narration of Abu Safwan was narrated by Imam Bukhari (rahimahullah) himself with a connected chain.
(Sahih al-Bukhari, Al-At’imah, Hadith: 5452)
Imam Bayhaqi (rahimahullah) said regarding this hesitation that if, in a connected hadith, it is explicitly stated that a word is interpolated, then it can be called mursal; otherwise, we will consider the entire narration as connected.
(Fath al-Bari: 2/442)
And Allah knows best.
(3)
The word “qidr” (pot) indicates that the garlic added to the food was cooked, yet the Messenger of Allah (sallallahu alayhi wa sallam) did not eat it, and he also explained the reason for not eating it.
In reality, no matter how much garlic is cooked, it retains an unpleasant odor; however, the ummah is permitted to use it after cooking, while the Messenger of Allah (sallallahu alayhi wa sallam) avoided it even when cooked, as Imam Ibn Khuzaymah titled this hadith with the words:
“It was a special characteristic of the Messenger of Allah (sallallahu alayhi wa sallam) that he did not eat cooked garlic.”
Imam Qurtubi (rahimahullah) said that the garlic was not cooked to the extent that its unpleasant odor was eliminated, which is why the Messenger of Allah (sallallahu alayhi wa sallam) returned it.
(Fath al-Bari: 2/442)

Hadith Commentary:
It is reprehensible to bring any foul-smelling thing into the mosque or to enter the mosque after consuming such things.
The reason is clear: people will be troubled by its odor, and furthermore, the mosque is a pure and sacred place where the remembrance of Allah takes place.
Nowadays, it is also obligatory for those who smoke bidis or cigarettes to clean their mouths, remove the odor, and thoroughly rub their mouths with a miswak before coming to the mosque. If the worshippers are troubled by their smell, then it is evident how great a sin this will be.
Raw garlic, onions, and cigarettes, bidis, etc., all fall under the same ruling regarding foul-smelling things. The only difference is that if the odor of onions and garlic can be removed, then their use is permissible, as when they are cooked and their smell is eliminated.

Hadith Commentary:
(1)
The restriction of being raw applies to garlic; similarly, it is disliked in the Shariah to go to mosques and religious gatherings after eating onions, radishes, etc., because this causes harm to people and to the angels. In other hadiths, it is mentioned that such a person would be expelled from the mosque and driven towards Baqi'. Furthermore, during the recitation of adhkar (remembrances) and the Qur'an, there should not be a foul odor coming from the mouth.
(2)
According to the majority, eating such things is permissible (halal), but it is necessary to avoid them at the time of prayer and similar occasions so that others are not caused discomfort by them.
And Allah knows best.

Hadith Commentary:
➊
Every item whose consumption—whether eaten or drunk—causes odor to emanate from a person’s mouth is included under the ruling of garlic and onion.
This includes radish, wild leek (gandhna), tobacco, cigarettes, betel leaf with tobacco, and beedi, etc. Furthermore, eating garlic and onion in their raw state is prohibited.
If they are cooked and then consumed, their odor is eliminated; indeed, this clarification is explicitly mentioned in some narrations.
(Sahih al-Bukhari, al-Adhan, Hadith: 854)
➋
Imam al-Bukhari rahimahullah has also cited this hadith as a legal indication (dalalat shar‘iyyah), because the Messenger of Allah sallallahu alayhi wa sallam instructed the Companion to eat, and explained his own abstention by saying: “I converse privately with Jibril alayhis salam.”
He (Jibril alayhis salam) is bothered and harmed by their odor.
The noble recording angels (kiraman katibin) are not included in this; they remain with every human being. Then, the Prophet sallallahu alayhi wa sallam prohibited coming to the mosque after eating garlic and onion.
If these things were unlawful (haram), the Prophet sallallahu alayhi wa sallam would have absolutely forbidden their consumption.
And Allah knows best.

Hadith Commentary:
Vocabulary of the Hadith:
Al-Kurrath:
A type of malodorous vegetable, some varieties of which resemble onions and some resemble garlic, and some have no bulbs. Its singular form is kurrāthah.

Explanation:
1:
Foul-smelling vegetables or such things which have an unpleasant odor.

2:
In some narrations, the wording is (فَلَا یَقْرَبَنَّ الْمَسَاجِد) — "then let him not come near the mosques." The meaning of this hadith is precisely that one should not come to the mosques after eating garlic, onion, or similar foul-smelling things, because the angels are harmed by this. Other foul-smelling foods and things like cigarettes and bidis are also included in this ruling.

Benefits and Issues:
➊
If garlic and onion are eaten raw, they produce a very unpleasant odor.
This causes discomfort to those nearby as well as to the angels.
Therefore, coming to the mosque in this state has been strictly prohibited.
And by analogy, this applies also to tobacco or such vegetables that result in unpleasant belching.
Furthermore, keeping the mouth dirty and not using the tooth-stick (miswak) is an extremely reprehensible habit.

➋
In the hadith, the Companion radi Allahu anhu of the Messenger of Allah sallallahu alayhi wa sallam who is mentioned
is Hazrat Abu Ayyub Ansari radi Allahu anhu.
In (Sahih Muslim, Book of Drinks, Chapter: Permissibility of Eating Garlic, 2053), this is explicitly stated.

708. Commentary:

➊ Since mosques are the abode of the angels of mercy, therefore, it is prohibited to come to the mosque after eating something whose smell is generally noticeable to those around—whether through belching or when opening the mouth—because this is distressing to the angels and to worshippers who are angel-like in character. Besides the three mentioned items, anything else that causes a foul odor is also prohibited, for example: radish, hookah, cigarettes, and naswar, etc. Some scholars have also prohibited the entry of a person whose mouth or any other body part emits an odor due to illness and which causes aversion among people.

➋ This restriction is only for mosques, not for other places, because the presence of the angels of mercy is not certain there, nor is attendance by everyone necessary in those places.

➌ Since the reason for the prohibition is the foul odor, if the smell is removed by any means—for example, by cooking them, or by using or eating something afterwards that eliminates the odor from the mouth—then it will be permissible to come to the mosque. However, it is better not to head to the mosque after eating such things. Caution lies in this.

Benefit:
From this hadith, it is understood that raw garlic (thum), raw onion, or any other foul-smelling vegetable such as radish, etc., should not be eaten; however, it is permissible to eat them after cooking.