صَحِيحُ مُسْلِمٍ
Sahih Muslim 45 a
The Book of Faith
The evidence that one of the attributes of faith is to love for one's brother muslim that one loves for oneself of goodness
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، قَالَ سَمِعْتُ قَتَادَةَ، يُحَدِّثُ عَنْ أَنَسِ بْنِ مَالِكٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ لاَ يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لأَخِيهِ - أَوْ قَالَ لِجَارِهِ - مَا يُحِبُّ لِنَفْسِهِ .
It is narrated on the authority of Anas b. Malik that the Prophet (ﷺ) observed: "None amongst you believes (truly) until he loves for his brother" - or he said "for his neighbour" - "that which he loves for himself."
Sahih Muslim, 45 aSahihصحيح