Abdullah bin Abu Mulayka reported,

The people of Kufa wrote to Ibn Zubayr asking about the grandfather's share of inheritance. He replied, "As for the one about whom the Messenger of Allah ﷺ said, 'Had I taken anyone from this nation as a close friend, I would have taken him,' meaning Abu Bakr, he treated him as a father."

Bukhari 3658

Sahih

حدثنا سليمان بن حرب أخبرنا حماد بن زيد عن أيوب

عن عبد الله بن أبي مليكة قال

كتب أهل الكوفة إلى ابن الزبير في الجد فقال أما الذي قال رسول الله ﷺ لو كنت متخذا من هذه الأمة خليلا لاتخذته أنزله أبا يعني أبا بكر

البخاري 3658صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Virtues of the companions of the Prophet ﷺ
Chapter
Prophet's ﷺ saying, "If I were to take a close friend" as narrated by Abu Saeed
Numbering
Darussalam 3658
Bukhari 3658