Sunan an-Nasa'i 4541
سنن النسائي#4541SahihIt was narrated from Au Hurairah that the prophet granted a concession allowing estimation for 'Ararya sales, so long as they were five Wasq or less then that
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih Hadith
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 44:93