Sayyidah Umm Salamah (may Allah be pleased with her) narrates from the Prophet (peace and blessings be upon him) that the Prophet (peace and blessings be upon him) heard a dispute near the door of his apartment. He came out, and he (peace and blessings be upon him) said: "I am only a human being. Disputes come to me, and perhaps one may present his arguments more eloquently, so I consider him truthful and judge in his favour; then let him not take the right of his Muslim brother, for it is a piece of Hell."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20534