وَبِهِ وَبِهِ عَنْ أُمِّ سَلَمَةَ ، قَالَتْ : قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " مَنِ ابْتُلِيَ بِالْقَضَاءِ بَيْنَ النَّاسِ فَلا يَرْفَعَنَّ صَوْتَهُ عَلَى أَحَدِ الْخَصْمَيْنِ مَا لا يَرْفَعُ عَلَى الآخَرِ " .
Lady Umm Salamah (may Allah be pleased with her) narrates that the Noble Prophet (peace and blessings be upon him) said: "Whoever is put to trial by being made a judge among the people, he should not raise his voice before one of the two parties in a case until he raises his voice before the other party as well (i.e., he should treat both equally)."