The Messenger of Allah ﷺ said: “If two disputants sit before you, do not speak until you have listened to the second one as you listened to the first.ʿ  

قَالَ رَسُولُ اللهِ ﷺ إِذَا جَلَسَ إِلَيْكَ الْخَصْمَانِ فَلا تَكَلَّمْ حَتَّى تَسْمَعَ مِنَ الْآخَرِ كَمَا سَمِعْتَ مِنَ الْأَوَّلِ  

[Machine] The Messenger of Allah ﷺ sent me to Yemen, and I said, "You are sending me to a people with sharp teeth, and I am still young." He said, "When the two disputants come to you, do not make a judgment until you have heard from the other, just as you have heard from the first." Ali said, "And I continued to be a judge."  

بَعَثَنِي رَسُولُ اللَّهِ ﷺ إِلَى الْيَمَنِ فَقُلْتُ تَبْعَثُنِي إِلَى قَوْمٍ ذَوِي أَسْنَانٍ وَأَنَا حَدَثُ السِّنِّ قَالَ «إِذَا جَلَسَ إِلَيْكَ الْخَصْمَانِ فَلَا تَقْضِ لِأَحَدِهِمَا حَتَّى تَسْمَعَ مِنَ الْآخَرِ كَمَا سَمِعْتَ مِنَ الْأَوَّلِ» قَالَ عَلِيٌّ فَمَا زِلْتُ قَاضِيًا