It is narrated from Abdullah bin Mas'ud that he said: We were walking with the Messenger of Allah, peace and blessings be upon him, when we passed by some children who were playing. When these children saw the Prophet, peace and blessings be upon him, they scattered, but Ibn Sayyad remained seated, as if he had angered the Messenger of Allah, peace and blessings be upon him. The Prophet, peace and blessings be upon him, said to him: "What is the matter with you? May your hands be dusted! Do you bear witness that I am the Messenger of Allah?" He said: "Do you bear witness that I am the Messenger of Allah?" Umar said: "O Messenger of Allah (peace and blessings be upon him), let me kill this wicked one." The Prophet, peace and blessings be upon him, said: "Leave him. If he is the one you fear, you will never be able to kill him."