Sunan an-Nasa'i 4476
سنن النسائي#4476SahihIt was narrated from Ibn Al-Had, from 'Abdullah bin Dinar, from 'Abdullah bin 'Umar, that he heard the Messenger of Allah (ﷺ) say:"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
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 ZaiHasan
In-book reference: 44:28