Narrated 'Umar bin Al-Khattab:
"Abu Bakr is our chief, and the best of us, and the most beloved of us to the Messenger of Allah (ﷺ)." (FR)
English reference (FR): Vol. 1, Book 46, Hadith 3656 (FR)
Arabic reference (FR): Book 49, Hadith 4017 (FR)