Bukhari

Hadith Commentary:

Qastallani said that according to our companions, the correct view is that obligatory zakat is forbidden (haram) for the family of the Prophet (sallallahu alayhi wa sallam).
This is also the statement of Imam Ahmad ibn Hanbal (rahimahullah).
Imam Ja'far al-Sadiq—al-Shafi'i (rahimahullah) and al-Bayhaqi (rahimahullah) have narrated from him—that he used to drink water from the public pathways.
People said: "This is water from charity (sadaqah)." He replied: "Obligatory zakat is forbidden (haram) for us."

Hadith Commentary:
(1)
Imam Bukhari rahimahullah, due to the difference of opinion on this issue, did not make a decisive and certain ruling regarding it. In any case, three points can be discussed concerning this matter:
➊ Every type of charity (sadaqah) was forbidden for the Messenger of Allah sallallahu alayhi wa sallam, whether it was obligatory or voluntary.
➋ Along with him, this ruling also included his family and descendants.
➌ By "family" (Aal), what is meant are Banu Hashim and Banu Muttalib.

(2)
Charity (sadaqah) was forbidden for him because charity and alms are considered the impurities of people, and the noble person of the Messenger of Allah sallallahu alayhi wa sallam is far above and exalted from such things.
Another reason for its prohibition could be that people would not get the opportunity to say that the claim of prophethood was merely staged to collect charity.
In any case, it was extremely necessary for him to abstain from charity, because this was made a sign of his prophethood. Thus, Salman al-Farsi radi Allahu anhu states that he (the Prophet) would accept gifts but would not eat from charity.
And Allah knows best.

Hadith Commentary:
"Kakh kakh" is said in Persian to scold children when they do something dirty.
From this, it is also proven that the use of languages other than Arabic is permissible.
Especially the Persian language, which for a long time has been the most beloved language among Muslims.
A great treasure of Islamic sciences is preserved in it.
In the battlefield, the use of any language as needed is permissible.
Regarding the etymology of "Farsi" (Persian), Hafiz Sahib states:
It is said that they are attributed to Fars bin Komarth. It is said that he was from the descendants of Sam bin Nuh (Noah), and it is also said from the descendants of Yafith bin Nuh, and it is said that he was a direct son of Adam, and some have even said that he was Adam himself. It is also said that they are called "Fars" because their supreme ancestor had seventeen sons, each of whom was a brave horseman, so they were called "Fars" (horsemen) (Fath).
That is, the inhabitants of this land are attributed to Fars bin Komarth, who is from the progeny of Sam bin Nuh or Yafith bin Nuh. Some have called him a son of Adam, and some have even said he was Adam himself.
It is also said that their supreme ancestor had seventeen sons, all of whom were brave horsemen; therefore, their descendants were called "Fars." And Allah knows best.

Hadith Commentary:
1.
In the aforementioned hadiths, the Messenger of Allah (sallallahu alayhi wa sallam) used non-Arabic words.
In the first hadith, the word "soor" is used.
In the Persian language, this word is used in the sense of "ziyafat," meaning hospitality.
In the second hadith, the word "sunnah" is used, which in the Abyssinian language refers to something excellent.
In the third hadith, "kakh" is a Persian word used to scold children when they do something inappropriate.
In any case, the use of languages other than Arabic is permissible, and these hadiths are also intended as a refutation of those who express aversion to learning languages other than Arabic. Indeed, the Messenger of Allah (sallallahu alayhi wa sallam) himself sometimes used Persian words.
2.
In this regard, Imam Bukhari (rahimahullah) has pointed out the weakness of some hadiths, for example:
Whoever speaks in the Persian language, his wickedness will increase and his dignity will decrease.
(al-Mustadrak al-Hakim 4/88)
Whoever can speak Arabic well should not converse in Persian, for this language creates hypocrisy.
(al-Mustadrak al-Hakim 4/87)
Hafiz Ibn Hajar (rahimahullah) has written that the chains of transmission of these hadiths are extremely weak.
(Fath al-Bari 6/221)
3.
Linguistic discord in human society is extremely dangerous.
Islam has strictly prevented this, therefore harboring prejudice regarding any language is a very bad thing.
And Allah knows best.