Muhammad went back home to his wife Khadijah and told her what had happened. New revelations came to him commanding him to preach what was being sent "down" from God. When Muhammad first started teaching, many of the people of Mecca, who worshipped idols, did not like the things that Muhammad said. But there were also people who listened to his preaching and obeyed his messages. These people were the first of the followers of Islam. Leaders of Mecca punished and tortured the followers of Islam. Some followers of Islam were executed. Muhammad resisted this and continued to teach Islam.