the Prophet forbade Muhaqalah, Muzahanah, Mukhabarah and selling with an exception unless it is defined.
Sunan an-Nasa'i Book 44, Hadith 185
← Previous Hadith "The Messenger of Allah forbade two transactions in one."

Sunan an-Nasa'i Book 44, Hadith 184 Next Hadith → "The Messenger of Allah forbade Muhaqalah, Muzahanah, Mukhabarah, Mu'awamah, and selling with an exception unless it is defined but he gave concession allowing 'Araya.

Sunan an-Nasa'i Book 44, Hadith 186