Urwa reported,

The Prophet ﷺ approached Abu Bakr to ask for Ayesha's hand in marriage.Abu Bakr said to him, "But I am your brother."He replied, "You are my brother in the religion of Allah and His Book, and she is lawful for me to marry."

Azami 10402

Sahih

عن عروة

أن النبي ﷺ يخاطب عائشة إلى أبي بكر، فقال له أبو بكر: إنما أنا أخوك، فقال: أنت أخي في دين الله، وكتابه، وهي لي حلال.

الأعظمي 10402صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Virtues of the Companions and reports about them
Chapter
Virtues of the women Companions, virtues of the women of the household of Prophethood
Section
News of Ayesha
Numbering
Jami al-Kamil 10402 (2nd edition)
Azami 10402