Musnad Ahmad — Hadith #45105

Yahya told me, on the authority of Al-A'mash, on the authority of Amr ibn Murrah, on the authority of Abu Al-Bakhtari, on the authority of Ali, may God be pleased with him, who said that the Messenger of God, may God bless him and grant him peace, sent me May God bless him and grant him peace, to Yemen when I was young. He said, “I said, ‘Are you sending me to a people among whom there are disputes, and I have no knowledge of the judiciary?’” He said, “God will guide your tongue and make your heart firm.” He said, “I have never doubted a judgment between two people after that.”