(5) باب قَوْلِ النَّبِيِّ صلى الله عليه وسلم " لَوْ كُنْتُ مُتَّخِذًا خَلِيلاً " قَالَهُ أَبُو سَعِيدٍ
Narrated Ibn `Abbas:
The Prophet (ﷺ) said, "If I were to take a Khalil, I would have taken Abu Bakr, but he is my brother and my companion (in Islam).
Reference: Sahih al-Bukhari 3656
In-book reference: Book 62, Hadith 8
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 57, Hadith 8