Sunan an-Nasa'i, Volume 6, Book 47, Hadith 5020 (DarusSalam) ⓘ

It was narrated from Anas that : The Messenger of Allah [SAW] said: "By the One in Whose hand is the soul of Muhammad, none of you has believed until he loves for his brother what he loves for himself of goodness."

أَخْبَرَنَا مُوسَى بْنُ عَبْدِ الرَّحْمَنِ قَالَ حَدَّثَنَا أَبُو أُسَامَةَ عَنْ حُسَيْنٍ وَهُوَ الْمُعَلِّمُ عَنْ قَتَادَةَ عَنْ أَنَسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ وَالَّذِي نَفْسُ مُحَمَّدٍ بِيَدِهِ لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لِأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ مِنْ الْخَيْرِ