It is narrated from Hazrat Imran (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Whoever hears about the emergence of Dajjal, let him stay away from him (he said this sentence three times), because a person will go to him thinking that he is a believer, but as he sees things that cause doubt with Dajjal, he will continue to follow him.