Anas bin Malik reported,

Anas bin Malik reported that he heard the latter part of Umar's sermon when he sat upon the pulpit, on the day after the Prophet ﷺ passed away. Umar gave the testimony of faith while Abu Bakr remained silent, not speaking.Umar said, "I had hoped that the Messenger of Allah ﷺ would live long enough to outlast us all," meaning that he would be the last of them to die. "But if Muhammad ﷺ has died, then Allah the Exalted has placed among you a light by which you may be guided, the very guidance of Allah by which He guided Muhammad ﷺ. And Abu Bakr is the companion of the Messenger of Allah ﷺ, the second of the two. He is the most deserving of the Muslims to take charge of your affairs, so rise and pledge allegiance to him."A group of them had already pledged allegiance to him earlier at the portico of Banu Saidah, but the general public's pledge took place at the pulpit.Zuhri reported from Anas bin Malik, "I heard Umar say to Abu Bakr that day, 'Ascend the pulpit.' He kept urging him until he ascended the pulpit, and the people pledged allegiance to him in general."

عن أنس بن مالك

أنه سمع خطبة عمر الآخرة حين جلس على المنبر، وذلك الغد من يوم توفي النبي ﷺ، فتشهد وأبو بكر صامت لا يتكلم، قال: كنت أرجو أن يعيش رسول الله ﷺ حتى يدبرنا، يريد بذلك أن يكون آخرهم، فإن يك محمد ﷺ قد مات، فإن الله تعالى قد جعل بين أظهركم نورا تهتدون به هدى الله محمدا ﷺ، وإن أبا بكر صاحب رسول الله ﷺ ثاني اثنين، فإنه أولى المسلمين بأموركم فقوموا فبايعوه، وكانت طائفة منهم قد بايعوه قبل ذلك في سقيفة بني ساعدة، وكانت بيعة العامة على المنبر. قال الزهري، عن أنس بن مالك: سمعت عمر يقول لأبي بكر يومئذ: اصعد المنبر، فلم يزل به حتى صعد المنبر، فبايعه الناس عامة.