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bukhari:3657Muʿallá And Mūsá > Wuhayb > Ayyūb

The Prophet ﷺ said, "If I were to take a Khalil, I would have taken him (i.e. Abu Bakr) as a Khalil, but the Islamic brotherhood is better."  

البخاري:٣٦٥٧حَدَّثَنَا مُعَلَّى وَمُوسَى قَالاَ حَدَّثَنَا وُهَيْبٌ عَنْ أَيُّوبَ

وَقَالَ لَوْ كُنْتُ مُتَّخِذًا خَلِيلاً لاَتَّخَذْتُهُ خَلِيلاً وَلَكِنْ أُخُوَّةُ الإِسْلاَمِ أَفْضَلُ  

حَدَّثَنَا قُتَيْبَةُ حَدَّثَنَا عَبْدُ الْوَهَّابِ عَنْ أَيُّوبَ مِثْلَهُ