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)." (DE)
English reference (DE): Vol. 1, Book 46, Hadith 3656 (DE)
Arabic reference (DE): Book 49, Hadith 4017 (DE)