It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) sent me to Yemen. I said: You are sending me to people who are elders (experienced), while I am still young?! He (peace and blessings be upon him) said: "When two litigants sit before you, do not judge in favour of one of them until you have heard from the other as you heard from the first." Sayyiduna Ali (may Allah be pleased with him) said: After that I always remained (a successful) judge. This hadith is sahih al-isnad (authentic in its chain), but the two Shaykhs (Bukhari and Muslim) did not record it.