Mujahid (may Allah have mercy on him) narrates: I went to Tawus and told him what I had heard from Sayyiduna Rafi' bin Khadij (may Allah be pleased with him) about the prohibition of muhaqalah. Tawus struck me on the chest and said: "You narrate to me from Rafi', when Mu'adh bin Jabal (may Allah be pleased with him) acted upon it in the time of the Messenger of Allah (peace and blessings be upon him) and gave land out for a half or a third (of its produce)?"
Hadith Referenceالمعجم الكبير للطبراني / باب الراء / 4355