Faith
لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لِأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ
Translation
None of you truly believes until he loves for his brother what he loves for himself.
Narrator
Anas ibn Malik
Source
Sahih Bukhari & Muslim
Bukhari 13, Muslim 45

