Sunan an-Nasa'i · Hadith 4475

أخبرنا علي بن حجر، عن إسماعيل، عن عبد الله بن دينار، عن ابن عمر، قال قال رسول الله صلى الله عليه وسلم ‏"‏ كل بيعين لا بيع بينهما حتى يتفرقا إلا بيع الخيار ‏"‏ ‏.‏

It was narrated from Ismail from 'Abdullah bin Dinar, from Ibn 'Umar, who said: "The Messenger of Allah said: 'When two people meet to engage in trade, the transaction between them is not binding until they separate, unless they have chosen to conclude the transaction.,'"

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