Abdullah b. Umar reported:
'Umar b. Khattab went along with Allah's Messenger ( صلی اللہ علیہ وسلم ) in the company of some persons to Ibn Sayyad that he found him playing with children near the battlement of Bani Maghala and Ibn Sayyad was at that time just at the threshold of adolescence and he did not perceive (the presence of Holy Prophet) until Allah's Messenger ( صلی اللہ علیہ وسلم ) struck his back with his hands. Allah's Messenger ( صلی اللہ علیہ وسلم ) said: Ibn Sayyad, don't you bear witness that I am the messenger of Allah? Ibn Sayyad looked toward him and he said: I bear witness to the fact that you the messenger of the unlettered. Ibn Sayyad said to the Allah's Messenger ( صلی اللہ علیہ وسلم ): Do you bear witness to the fact that I am the messenger of Allah? Allah's Messenger ( صلی اللہ علیہ وسلم ) rejected this and said: I affirm my faith in Allah and in His messengers. Then Allah's Messenger ( صلی اللہ علیہ وسلم ) said to him: What do you see? Ibn Sayyad said: It is a Dukh. Thereupon Allah's Messenger ( صلی اللہ علیہ وسلم ) said: May you be disgraced and dishonoured, you would not not be able to go beyond your rank. 'Umar b. Khattab said: Allah's Messenger, permit me that I should strike his neck. Thereupon Allah's Messenger ( صلی اللہ علیہ وسلم ) said: If he is the same (Dajjal) who would appear near the Last Hour, you would not be able to overpower him, and if he is not that there is no good for you to kill him.