Ibn Asakir reported: Ali ibn Abi Talib, may Allah be pleased with him, said, “Whoever desires to be fair to people, let him love for them as he loves for himself.”
Source: Tārīkh Dimashq 44955
عن ابن عساكر قَالَ عَلِيٌّ رضي الله عنه مَنْ أَرَادَ أَنْ يَنْصِفَ النَّاسَ مِنْ نَفْسِهِ فَلْيُحِبَّ لَهُمْ مَا يُحِبَّ لِنَفْسِهِ
44955 تاريخ دمشق لابن عساكر