Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: When the Prophet Muhammad (peace be upon him) came to Madinah, people used to practice forward sales (salam). The Prophet Muhammad (peace be upon him) said to them: Whoever does a forward sale should do so with specified measure and specified weight. (Imam Ibn Hibban, may Allah have mercy on him, says:) The narrator named Abu Minhal is Abdul Rahman bin Mut’im.