Members of the Prophet's family that embraced Islam the first day did so, on the basis of his

Members of the Prophet's family that embraced Islam the first day did so, on the basis of his truthfulness and uprightness. The Prophet Muhammad was known to be an honest and trustworthy person even before his Prophethood. His family members witnessed his character and actions, and they believed in him when he started preaching the message of Islam. They knew that he would not lie or deceive them, and they trusted him completely. This is why they were among the first to accept Islam.