Sunan an-Nasa'i 4477

سنن النسائي#4477Sahih

It was narrated from Sufyan, from 'Amr 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 concluded the transaction

Scholarly Authentication

We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:

Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Bukhari

In-book reference: 44:29