To like for one‘s (Muslim‘s) brother what one likes for himself is a part of faith
باب مِنَ الإِيمَانِ أَنْ يُحِبَّ لأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ
Sahih al-Bukhari, Book of Belief(view book)
Sahih al-Bukhari 13
Narrated Anas:
The Prophet ﷺ said, "None of you will have faith till he wishes for his (Muslim) brother what he likes for himself."
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ ـ رضى الله عنه ـ عَنِ النَّبِيِّ ﷺ.وَعَنْ حُسَيْنٍ الْمُعَلِّمِ، قَالَ حَدَّثَنَا قَتَادَةُ، عَنْ أَنَسٍ، عَنِ النَّبِيِّ ﷺ قَالَ " لا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ ".
Classification
Sahih (Authentic)