Sahih al-Bukhari 62:10
Narrated `Abdullah bin Abi Mulaika:
The people of Kufa sent a letter to Ibn Az-Zubair, asking about (the inheritance of) (paternal) grandfather. He replied that the right of the inheritance of (paternal) grandfather is the same as that of father if the father is dead) and added, "Allah's Messenger (ﷺ) said, ' If I were to take a Khalil from this nation, I would have taken him (i.e. Abu Bakr).
Reference
Sahih al-Bukhari 62:10
In-book reference
Book 62, Hadith 10
Arabic Text
حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، أَخْبَرَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ أَيُّوبَ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي مُلَيْكَةَ، قَالَ كَتَبَ أَهْلُ الْكُوفَةِ إِلَى ابْنِ الزُّبَيْرِ فِي الْجَدِّ. فَقَالَ أَمَّا الَّذِي قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لَوْ كُنْتُ مُتَّخِذًا مِنْ هَذِهِ الأُمَّةِ خَلِيلاً لاَتَّخَذْتُهُ ". أَنْزَلَهُ أَبًا يَعْنِي أَبَا بَكْرٍ.