Narrated 'Aishah:
that the Messenger of Allah (ﷺ) said: "It is not befitting that a group, among whom is Abu Bakr, be led by other than him." (JA)
English reference (JA): Vol. 1, Book 46, Hadith 3673 (JA)
Arabic reference (JA): Book 49, Hadith 4036 (JA)