Sayyidah Umm Salamah (may Allah be pleased with her) said: Two men of the Ansar came with a dispute over an inheritance whose traces had been effaced, and those who knew about it had died. He (peace and blessings be upon him) said: "I am a human; in matters about which nothing has been revealed to me, I judge by my own opinion. Whomever I give judgement in favour of from his brother's right, it is as though I am giving him a piece of fire." The two of them were weeping and said: O Messenger of Allah (peace and blessings be upon him), give my right to him! He (peace and blessings be upon him) said: "Go and divide it between yourselves, aim for what is right, then cast lots, then let each of you release the other (from his right)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الدعوى والبينات / 21244