One day Abu Bakr as-Siddiq Radi Allahu anhu came to Rasûlullah’s ‘sall-Allâhu ’alaihi wa sallam’ place. He was about to enter, when Alî bin Abî Tâlib ‘radiy-Allâhu ’anh’ arrived, too. Abû Bakr stepped backwards and said,
“After you, Ya Ali.” The latter replied and the following long dialogue took place between them:
Hazarath Ali razi allah anhu
The Ahl-e-Sunnat wa Jama’at has reached consensus (Ijma’) that after the Prophets (Alaihim as-Salam) the best of creation are the four rightly guided Khalifas (Khulafa-e-Arba’a i.e. Hadrat Abu Bakr, Hadrat Umar, Hadrat Uthman and Hadrat Ali Radi Allahu Ta’ala Anhum Ajma’een). Their sequence of excellence is that Sayyiduna Abu Bakr as-Siddique is the most excellent, then Sayyiduna
"After his election as the Caliph, Abu Bakr Siddiq Razi Allah Anhu addressed the Muslims with these words: "O People! I have been chosen by you as your leader, although I am no better than any of you. If I do any wrong, set me right. Listen, truth is honesty and untruth is dishonesty. The weak among you are the powerful in my eyes, as long as I do not give them their dues. The powerful among you are weak in my eyes, as long as I do not take away from them what is due to others.