Sunan an-Nasa'i 4503
سنن النسائي#4503SahihIt was narrated from Ibn 'Umar that the Prophet said:"No one of you should urge someone to cancel a sale he has already agreed upon with his brother so as to sell him his own goods
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 - Agreed Upon
In-book reference: 44:55