We were traveling with the Messenger of Allah ﷺ, and I was riding a water-carrying camel.The Messenger of Allah ﷺ said, "Will you sell it to me for such-and-such, and may Allah forgive you?"I said, "Yes, it is yours, Prophet of Allah."He said, "Will you sell it to me for such-and-such, and may Allah forgive you?"I said, "Yes, it is yours, Prophet of Allah."He said, "Will you sell it to me for such-and-such, and may Allah forgive you?"I said, "Yes, it is yours."Abu Nadra said, "It was a phrase the Muslims used to say, 'Do such-and-such, and may Allah forgive you.'"
أخبرنا محمد بن عبد الأعلى قال حدثنا المعتمر قال سمعت أبي قال حدثنا أبو نضرة
كنا نسير مع رسول الله ﷺ وأنا على ناضح فقال رسول الله ﷺ أتبيعنيه بكذا وكذا والله يغفر لك قلت نعم هو لك يا نبي الله قال أتبيعنيه بكذا وكذا والله يغفر لك قلت نعم هو لك يا نبي الله قال أتبيعنيه بكذا وكذا والله يغفر لك قلت نعم هو لك قال أبو نضرة وكانت كلمة يقولها المسلمون افعل كذا وكذا والله يغفر لك
[Its chain of transmission is sahih. Ahmad narrated it, 3/373, 374, from the hadith of Sulayman Taymi with the same wording, at length, mentioning the camel and the exception clause. It is also in Sahih Muslim, in the book on irrigation partnerships, chapter on selling... and it is in Sahih Bukhari, no. 2718, after no. 112, no. 1599, from the hadith of Abu Nadra with the same wording, and it is in Kubra, no. 6237.]