When Uthman came to Makkah, he came to know that Muhammad (peace be upon him) had declared his Prophetic mission. Uthman called on Abu Bakr, and they talked long about Muhammad (peace be on him). Uthman told Abu Bakr of the voice that he had heard while travelling in Syria. Abu Bakr told Uthman that he had taken the oath of allegiance to the Prophet Muhammad (peace be on him), and he advised Uthman to do likewise, for verily Muhammad (peace be on him) was the Apostle of Truth. Abu Bakr took Uthman to the Holy Prophet. The Holy Prophet welcomed Uthman, and told him of his experience in Mt. Hira, the visitation of the angel Gabriel, and the call to prophethood. Uthman felt thrilled on hearing this account. He told the Holy Prophet of the voice that he had heard in the course of his journey in Syria telling of the advent of a Prophet at Makkah. Uthman said that he had full faith in the Holy Prophet and believed in his mission. The Holy Prophet stretched his hand. Uthman grasped it in reverence, and declared "There is no god but Allah, and Muhammad is His Prophet". After Abu Bakr, Uthman was the second person to be converted to Islam