The Prophet ﷺ gave an Arabi the option to revoke the sale after it had been concluded. This is a hasan gharib hadith.
حدثنا عمر بن حفص الشيباني حدثنا ابن وهب عن ابن جريج عن أبي الزبير
أن النبي ﷺ خير أعرابيا بعد البيع وهذا حديث حسن غريب
No references are available.
[Its chain of transmission is daif] It was also reported by Ibn Majah, in the Book of Trade, Chapter on the sale with an option to cancel, hadith no. 2184, through the hadith of Abdullah bin Wahb, with the same chain. Hakim graded it sahih according to the criteria of Muslim, 2/49, and Dhahabi agreed with him. Ibn Jurayj explicitly stated that he heard it directly, and the hadith has corroborating narrations.