Musannaf Ibn Abi Shaybah 31027 — Book of the Judgments

It is narrated from Sayyidah Umm Salamah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "You people bring your disputes to me, and I am only a human being, and perhaps some of you present their argument better than others, so I judge between you on the basis of what I hear from you. So whoever I have ruled for concerning the right of his brother must not take that right, for I have given him a piece of the Fire, which he will bring with him on the Day of Resurrection."