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 bring your disputes to me, and I am only a human being. I judge between you according to what I hear from you. So if I give anyone something of his brother's right, then I am in fact only giving him a piece of the Fire."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19967