Full Sharh — Mishkat al-Masabih 44
وَعَن معَاذ أَنَّهُ سَأَلَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ أَفْضَلِ الْإِيمَانِ قَالَ: «أَنْ تُحِبَّ لِلَّهِ وَتُبْغِضَ لِلَّهِ وَتُعْمِلَ لِسَانَكَ فِي ذِكْرِ اللَّهِ قَالَ وماذا يَا رَسُول الله قَالَ وَأَن تحب للنَّاس مَا تحب لنَفسك وَتَكْرَهُ لَهُمْ مَا تَكْرَهُ لِنَفْسِكَ» . رَوَاهُ أَحْمَدُ
English Translation
He also said that he asked the Prophet what was the most excellent aspect of faith, and received the reply, “That you should love for God’s sake, hate for God’s sake, and employ your tongue in making mention of God.” “What more, messenger of God?” he asked and was told, “That you should like other people to have what you like yourself, and dislike that they should have what you dislike yourself.” Ahmad transmitted it.
Source
Mishkat al-Masabih(مشكاة المصابيح)
Faith
Hadith Number
44