Abu Bakr and Abbas passed by a gathering of the Ansar and found them weeping.Abu Bakr asked, "What is making you weep?"They replied, "We were recalling the Prophet's ﷺ sittings with us."Abu Bakr then went to the Prophet ﷺ and informed him of this. The Prophet ﷺ came out with the edge of a cloak wrapped around his head and ascended the pulpit, which he never ascended again after that day. He praised Allah and extolled Him, then said, "I urge you to take care of the Ansar, for they are my closest confidants and the keepers of my trust. They have fulfilled what was due from them, and what is owed to them remains. So accept from those of them who do well and overlook the faults of those of them who err."
مر أبو بكر والعباس بمجلس من مجالس الأنصار، وهم يبكون. فقال: ما يبكيكم؟ قالوا: ذكرنا مجلس النبي ﷺ منا، فدخل على النبي ﷺ فأخبره بذلك، قال: فخرج النبي ﷺ وقد عصب على رأسه حاشية برد قال: فصعد المنبر ولم يصعده بعد ذلك اليوم، فحمد الله وأثنى عليه، ثم قال: أوصيكم بالأنصار؛ فإنهم كرشي وعيبتي، وقد قضوا الذي عليهم، وبقي الذي لهم، فاقبلوا من محسنهم، وتجاوزوا عن مسيئهم.
Bukhari narrated it in Manaqib Ansar (3799), from Muhammad bin Yahya Abu Ali, who said, our teacher Shazan, brother of Abdan, told us, my father told us, Shuba bin Hajjaj informed us, from Hisham bin Zayd, who said, I heard Anas bin Malik say, and then he mentioned it. Muslim also narrated it in Fadail al-Sahabah (2510) through another route, from Shuba, I heard Qatada narrating from Anas, but he mentioned only the raised part of the hadith, without the story.As for his saying, "The Ansar are my stomach lining and my innermost pouch," this means, my community and my closest ones. Khattabi said in Alam Hadith (3/1144), "My stomach lining and my innermost pouch, he means that they are his inner circle and his closest ones. The stomach lining is used as an analogy because it is where an animal's nourishment settles, and it is by this nourishment that the animal survives. The word 'stomach' can also refer to a man's dependents and family, as it is said, 'so-and-so has a scattered stomach,' meaning many dependents. As for the 'pouch,' it is where a person stores his finest and most treasured garments, and it too is used here as an analogy, meaning that they are the place of his secrets and his trust."