Imam Ibn Qayyim al-Jauziyyah:
"He (I.e Abu Bakr) protected the Messenger with everything at his disposal. He accompanied the Prophet (‘Alayhi salaatu wa salaam) during his life and death. How could anyone deny his virtues? To do so would be to try to cover the sun in the middle of the day. He is the best among the Companions, and whoever loves him is a believer."