It is related that 'Abdullah ibn 'Umar reported that 'Umar went with the Messenger of Allah, may Allah bless him and grant him peace, with a group to visit Ibn Sayyad. They found him playing with some children in the hills of Banu Maghala. Ibn Sayyad, who was approaching puberty, did not notice them until the Prophet, may Allah bless him and grant him peace, patted him with his hand and then said to him, 'Do you testify that I am the Messenger of Allah?' Ibn Sayyad looked at him and said, 'I testify that you are the Messenger of the unlettered.' Ibn Sayyad said to the Prophet, 'Do you testify that I am the Messenger of Allah?' He refuted it and said, 'I have believed in Allah and His Messengers.' Then he said to him, 'What dreams do you have?' Ibn Sayyad replied, 'Both truthful people and liars come to me.' The Prophet, may Allah bless him and grant him peace, said, 'You are in a state of confusion.' Then the Prophet, may Allah bless him and grant him peace, said to him, 'I am concealing something from you.' Ibn Sayyad said, 'It is just smoke.' He said, 'Shame on you! You will not go too far.' 'Umar said, 'Messenger of Allah, let me cut his head off?' The Prophet, may Allah bless him and grant him peace, said, 'If it is him (i.e. the Dajjal), you will not be able to get the better of him. If it is not him, there is no point in killing him.'"