When the Messenger of Allah (SAW) became unable to lead the prayers, he asked Hz. Abu Bakr (RA) to lead the believers in prayer. In fact, he even prayed behind him.
After the passing of the Messenger of Allah (SAW), Hz. Abu Bakr (RA) was chosen as the caliph and received the pledge of allegiance from the companions. He had a calm and serene temperament.
Shortly before his passing, Hz. Abu Bakr (RA) appointed Hz. Umar (RA) as his successor to ensure the unity and correctness of the Ummah after him.