Tirmidhi

Explanation:
1:
That is, whoever seeks everything only from Allah,
does not follow any path other than the path of Islam, and acts upon the Shari‘ah brought by the Noble Prophet (sallallahu alayhi wa sallam), then such a person will surely taste the sweetness of faith,
because his heart will be filled with faith,
and faith will be thoroughly ingrained within him.

Hadith Commentary: Benefits and Issues:
Qasim rahimahullah’s father is Ubaydullah rahimahullah ibn Umar ibn al-Khattab radi Allahu anhu. Therefore, both Umar radi Allahu anhu and Ibn Umar radi Allahu anhu are counted among his paternal lineage. His mother, Umm Abdullah, is from the descendants of Abu Bakr radi Allahu anhu.

Hadith Authentication (Takhrij al-Hadith):
[صحيح مسلم 151]

Jurisprudence of the Hadith (Fiqh al-Hadith)
➊ From this hadith, it is understood that whoever does not commit shirk (polytheism) or disbelief, considers only Allah as his Lord, the remover of difficulties and fulfiller of needs, acknowledges Sayyiduna Muhammad sallallahu alayhi wa sallam as the (final) Messenger and Prophet, and regards Islam alone as his religion, then such a person is a believer and perfect in faith.
Among the three pillars of Islam (Tawhid, Prophethood, and the Hereafter), the first pillar is Tawhid (monotheism). Whoever associates any creature in the exclusive attributes of Allah, all the deeds of such a person are nullified and rejected.
✿ Allah the Exalted says:
«وَلَوْ أَشْرَكُوا لَحَبِطَ عَنْهُم مَّا كَانُوا يَعْمَلُونَ»
“If they had committed shirk, all their deeds would have become null and void.” [الانعام : 88]
➋ Abu al-Fadl Abbas ibn Abd al-Muttalib radi Allahu anhu was the uncle of the Messenger of Allah sallallahu alayhi wa sallam. He was two or three years older than the Prophet sallallahu alayhi wa sallam. He accepted Islam either before or after the Battle of Badr. He remained steadfast with the Messenger of Allah sallallahu alayhi wa sallam during the Battle of Hunayn. [صحيح مسلم : 1775، دارالسلام : 4612]
❀ The Messenger of Allah sallallahu alayhi wa sallam said:
«هذا العباس بن عبدالمطلب أجود قريش كفاً وأوصلها»
“This is Abbas ibn Abd al-Muttalib, the most generous and the one who maintains the ties of kinship the most among the Quraysh.” [مسند أحمد 185/1 وسنده حسن، النسائي فى الكبري : 8174 وصححه ابن حبان، الاحسان : 7052 والحاكم 338/3، 329 ووافقه الذهبي]
The thirty-five (35) hadiths narrated by him are recorded in the Musnad of Baqi ibn Makhlad. Hafiz Dhahabi rahimahullah has written his detailed biography. [سيراعلام النبلاء 78/2۔ 103]
He passed away in 32 AH or 34 AH. «رضي الله عنه»