Sunan an-Nasa'i 4519
سنن النسائي#4519SahihIt was narrated from Ibn 'Uar that the Messenger of Allah said:"Do not sell fruits until their condition is known. And he forbade (both) the seller and the purchaser (to engage in such a 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 ZaiIsnaad Sahih
In-book reference: 44:71