Sunan an-Nasa'i 4633
سنن النسائي#4633SahihIt was narrated from Jabir that:the Prophet forbade Muhaqalah, Muzahanah, Mukhabarah and selling with an exception unless it is defined
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: 44:185