(Imam Bukhari narrates that) Musaddad narrated to us, he said: Yahya narrated to us, from Shu'bah, from Qatadah, from Hazrat Anas (may Allāh be pleased with him), from the Prophet ﷺ, and Husain Al-Mu'allim said: Qatadah narrated to us, from Anas, from the Prophet ﷺ, that he said:
None of you will be a (complete) believer until he likes for his brother what he likes for himself.
حَدَّثَنَا مُسَدَّدٌ قَالَ: حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ ﵁، عَنِ النَّبِيِّ ﷺ. وَعَنْ حُسَيْنٍ الْمُعَلِّمِ قَالَ: حَدَّثَنَا قَتَادَةُ، عَنْ أَنَسٍ، عَنِ النَّبِيِّ ﷺ قَالَ
«لَا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لِأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ».
Reference: Sahih Al Bukhari 13