We were sitting with Abu Musa Al-Ash'sari, 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 said to him, "Come along! I have seen Messenger of Allah 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 said, "Come along! I will inform you about it (i.e., your oath). Once we went to Messenger of Allah 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 Ashʿariyin? Where are those Ashʿariyin?" 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 Messenger of Allah 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 Messenger of Allah ﷺ forgot his oath. By Allah, we will never be successful, for we have taken advantage of the fact that Messenger of Allah ﷺ forgot to fulfill his oath. So let us return to Messenger of Allah ﷺ to remind him of his oath.' We returned and said, 'O Messenger of Allah 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.' " (two other narrations through Zahdam as above) (Using translation from Bukhārī 6721)
كُنَّا عِنْدَ أَبِي مُوسَى فَقَدَّمَ فِي طَعَامِهِ لَحْمَ دَجَاجٍ وَفِي الْقَوْمِ رَجُلٌ مِنْ بَنِي تَيْمِ اللهِ أَحْمَرُ كَأَنَّهُ مَوْلًى فَلَمْ يَدْنُ قَالَ لَهُ أَبُو مُوسَى ادْنُ؛ فَإِنِّي قَدْ رَأَيْتُ رَسُولَ اللهِ ﷺ يَأْكُلُ مِنْهُ قَالَ إِنِّي رَأَيْتُهُ يَأْكُلُ شَيْئًا فَقَذِرْتُهُ فَحَلَفْتُ أَنْ لَا أَطْعَمَهُ أَبَدًا فَقَالَ ادْنُ أُخْبِرْكَ عَنْ ذَلِكَ إِنِّي أَتَيْتُ النَّبِيَّ ﷺ فِي رَهْطٍ مِنَ الْأَشْعَرِيِّينَ نَسْتَحْمِلُهُ وَهُوَ يَقْسِمُ نَعَمًا مِنْ نَعَمِ الصَّدَقَةِ قَالَ أَيُّوبُ أَحْسِبُهُ وَهُوَ غَضْبَانُ فَقَالَ لَا وَاللهِ مَا أَحْمِلُكُمْ وَمَا عِنْدِي مَا أَحْمِلُكُمْ فَانْطَلَقْنَا فَأُتِيَ رَسُولُ اللهِ ﷺ بِنَهْبِ إِبِلٍ فَقَالَ أَيْنَ هَؤُلَاءِ الْأَشْعَرِيُّونَ؟ فَأَتَيْنَا فَأَمَرَ لَنَا بِخَمْسِ ذَوْدٍ غُرِّ الذُّرَى فَانْدَفَعْنَا فَقُلْتُ لِأَصْحَابِي أَتَيْنَا رَسُولَ اللهِ ﷺ نَسْتَحْمِلُهُ فَحَلَفَ أَنْ لَا يَحْمِلَنَا ثُمَّ أَرْسَلَ إِلَيْنَا فَحَمَلَنَا فَقُلْتُ نَسِيَ رَسُولُ اللهِ ﷺ يَمِينَهُ وَاللهِ لَئِنْ تَغَفَّلْنَا رَسُولَ اللهِ ﷺ يَمِينَهُ لَا نُفْلِحُ أَبَدًا ارْجِعُوا بِنَا إِلَى رَسُولِ اللهِ ﷺ فَلْنُذَكِّرْهُ يَمِينَهُ فَرَجَعْنَا إِلَيْهِ فَقُلْنَا يَا رَسُولَ اللهِ أَتَيْنَاكَ نَسْتَحْمِلُكَ فَحَلَفْتَ أَنْ لَا تَحْمِلَنَا ثُمَّ حَمَلْتَنَا فَعَرَفْنَا أَوْ ظَنَنَّا أَنَّكَ نَسِيتَ يَمِينَكَ فَقَالَ ﷺ انْطَلِقُوا فَإِنَّمَا حَمَلَكُمُ اللهُ ﷻ إِنِّي وَاللهِ إِنْ شَاءَ اللهُ لَاأَحْلِفُ عَلَى يَمِينٍ فَأَرَى غَيْرَهَا خَيْرًا مِنْهَا إِلَّا أَتَيْتُ الَّذِي هُوَ خَيْرٌ وَتَحَلَّلْتُهَا