Narrated Abu Sa`id Al-Khudri
The Prophet (ﷺ) delivered a sermon and said, "Allah gave a choice to one of (His) slaves either to choose this world or what is with Him in the Hereafter. He chose the latter." Abu Bakr wept. I said to myself, "Why is this Sheikh weeping, if Allah gave choice to one (of His) slaves either to choose this world or what is with Him in the Here after and he chose the latter?" And that slave was Allah's Messenger (ﷺ) himself. Abu Bakr knew more than us. The Prophet (ﷺ) said, "O Abu Bakr! Don't weep. The Prophet (ﷺ) added: Abu- Bakr has favored me much with his property and company. If I were to take a Khalil from mankind I would certainly have taken Abu Bakr but the Islamic brotherhood and friendship is sufficient. Close all the gates in the mosque except that of Abu Bakr.
Narrated Ibn `Abbas
"Allah's Messenger (ﷺ) in his fatal illness came out with a piece of cloth tied round his head and sat on the pulpit. After thanking and praising Allah he said, "There is no one who had done more favor to me with life and property than Abu Bakr bin Abi Quhafa. If I were to take a Khalil, I would certainly have taken Abu- Bakr but the Islamic brotherhood is superior. Close all the small doors in this mosque except that of Abu Bakr."