Narrated Abu Sa'eed Al-Khudri:
that Abu Bakr said: "Am I not the most deserving of it among the people, am I not the first to become Muslim, am I not the person of such and such, am I not the person of such and such." (ES)
English reference (ES): Vol. 1, Book 46, Hadith 3667 (ES)
Arabic reference (ES): Book 49, Hadith 4029 (ES)