Sahih al-Bukhari Hadith 6721

We were sitting with Abu Musa Al-Ash'sari رضی اللہ عنہ , and as there were ties of friendship and mutual favors between us and his tribe. His meal was presented before him and there was chicken meat in it. Among those who were present there was a man from Bani Taimillah having a red complexion as a non-Arab freed slave, and that man did not approach the meal. Abu Musa رضی اللہ عنہ said to him, "Come along! I have seen Allah's Messenger (ﷺ) eating of that (i.e., chicken)." The man said, "I have seen it (chickens) eating something I regarded as dirty, and so I have taken an oath that I shall not eat (its meat) chicken." Abu Musa رضی اللہ عنہ said, "Come along! I will inform you about it (i.e., your oath). Once we went to Allah's Messenger (ﷺ) in company with a group of Ash'airiyin, asking him for mounts while he was distributing some camels from the camels of Zakat. (Aiyub said, "I think he said that the Prophet was in an angry mood at the time.") The Prophet (ﷺ) said, 'By Allah! I will not give you mounts, and I have nothing to mount you on.' After we had left, some camels of booty were brought to Allah's Apostle and he said, "Where are those Ash`ariyin? Where are those Ash`ariyin?" So we went (to him) and he gave us five very fat good-looking camels. We mounted them and went away, and then I said to my companions, 'We went to Allah's Messenger (ﷺ) to give us mounts, but he took an oath that he would not give us mounts, and then later on he sent for us and gave us mounts, perhaps Allah's Messenger (ﷺ) forgot his oath. By Allah, we will never be successful, for we have taken advantage of the fact that Allah's Messenger (ﷺ) forgot to fulfill his oath. So let us return to Allah's Messenger (ﷺ) to remind him of his oath.' We returned and said, 'O Allah's Messenger (ﷺ)! We came to you and asked you for mounts, but you took an oath that you would not give us mounts) but later on you gave us mounts, and we thought or considered that you have forgotten your oath.' The Prophet (ﷺ) said, 'Depart, for Allah has given you Mounts. By Allah, Allah willing, if I take an oath and then later find another thing better than that, I do what is better, and make expiation for the oath.' Hadrat Hammad bin Zaid has reported it from Ayyub, Abu Qailaibah, Qasim bin Asim Kulaibi. Similarly, Qutaibah, Abdul Wahhab, Ayyub , Abu Qilabah, Qasim Tamimi reported this Hadith from Zahdam. Hadrat Abu Mamar, Abdul Warith, Ayyub, Qasim reported this Hadith from Zahdam as per aformentioned Hadith.