Sunan An-Nasa'i - سنن النسائي
47. The Book Of Faith and its Signs - كتاب الإيمان وشرائعه
19) Chapter: The Sign of Faith
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."
19) عَلَامَةُ الْإِيمَانِ
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