Sahih Muslim · Hadith 3930

حدثنا يحيى بن يحيى، قال قرأت على مالك عن نافع، عن ابن عمر، أن رسول الله صلى الله عليه وسلم قال ‏"‏ البيعان كل واحد منهما بالخيار على صاحبه ما لم يتفرقا إلا بيع الخيار ‏"‏ ‏.‏

Ibn 'Umar (Allah be pleased with them) reported Allah's Messenger (may peace be upon him) as saying: Both parties in a business transaction have the right to annul it so long as they have not separated; except in transactions which have been made subject to the right of parties to annul them.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).