Zahdam Jarmi reported,

We were with Abu Musa Ashari, and there was a bond of brotherhood between us and this clan of Jarm. Food was brought in which there was chicken meat, and among the gathering was a red-skinned man sitting who did not approach the food.Abu Musa said, "Come closer, for I saw the Messenger of Allah ﷺ eating from it."The man replied, "I saw it eating something I found disgusting, so I swore I would never eat it."Abu Musa said, "Come closer, let me inform you," or, "let me narrate to you. I came to the Prophet ﷺ with a group of Asharis, and I found him angry as he was distributing camels from the camels of charity. We asked him to provide us with mounts, but he swore he would not give us any. He said, 'I have nothing to mount you on.' Then some captured camels were brought to the Messenger of Allah ﷺ, and he asked, 'Where are the Asharis? Where are the Asharis?' He gave us five fine, white-humped camels.We had not gone far when I said to my companions, 'The Messenger of Allah ﷺ has forgotten his oath. By Allah, if we let the Messenger of Allah ﷺ overlook his oath, we will never succeed.' So we returned to the Prophet ﷺ and said, 'Messenger of Allah, we asked you for mounts, and you swore you would not give us any. We thought you had forgotten your oath.'He said, 'It is Allah who has provided you with mounts. By Allah, if Allah wills, I do not swear an oath and then see something better than it without doing what is better and freeing myself from the oath.'"

Bukhari 5518

Sahih

حدثنا أبو معمر حدثنا عبد الوارث حدثنا أيوب بن أبي تميمة عن القاسم

عن زهدم قال

كنا عند أبي موسى الأشعري وكان بيننا وبين هذا الحي من جرم إخاء فأتي بطعام فيه لحم دجاج وفي القوم رجل جالس أحمر فلم يدن من طعامه قال ادن فقد رأيت رسول الله ﷺ يأكل منه قال إني رأيته أكل شيئا فقذرته فحلفت أن لا آكله فقال ادن أخبرك أو أحدثك إني أتيت النبي ﷺ في نفر من الأشعريين فوافقته وهو غضبان وهو يقسم نعما من نعم الصدقة فاستحملناه فحلف أن لا يحملنا قال ما عندي ما أحملكم عليه ثم أتي رسول الله ﷺ بنهب من إبل فقال أين الأشعريون أين الأشعريون قال فأعطانا خمس ذود غر الذرى فلبثنا غير بعيد فقلت لأصحابي نسي رسول الله ﷺ يمينه فوالله لئن تغفلنا رسول الله ﷺ يمينه لا نفلح أبدا فرجعنا إلى النبي ﷺ فقلنا يا رسول الله إنا استحملناك فحلفت أن لا تحملنا فظننا أنك نسيت يمينك فقال إن الله هو حملكم إني والله إن شاء الله لا أحلف على يمين فأرى غيرها خيرا منها إلا أتيت الذي هو خير وتحللتها

البخاري 5518صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Slaughter and hunting
Chapter
Chicken
Numbering
Darussalam 5518
Bukhari 5518