From Omar Ibn al Khattab – may Allah be pleased with him -he said: While we are at the Messenger of Allah – peace be upon him – one day, a man came to us . He is a man of very white clothes and dark hair, we did not see the impact of travel on him , we do not know him, and he sat down to Prophet – peace be upon him – he assigned his knees to his knees, and hands on his thighs and said: He said: “O Muhammad, tell me about Islam? “The Messenger of Allah – peace be upon him -: (Islam is to confess that there is no god but Allah and that Muhammad is the Messenger of Allah – peace be upon him -, and offer the regular prayer and pay Zakat, and fast of Ramadan, and to do Hajj if you are able to go there. He said: you are right He [Umer (r)] said: we wondered that he asks and gives approval.
He said: tell me about the faith? He said: that you to believe in God, His angels, His Holy Books, His messengers, and the Last Day, and to believe in His decision of both good and evil. He said: you are right, and said: tell me about the virtue? He said: “The worship of God as if you are seeing Him or if you don’t see Him, He sees you.
He said tell me about the Last Day? He said: the questioned doesn’t know better than the questioner. He asked tell me about its signs? He said: it is to give birth a male slave to her male master .and you to see the barefoot , poor, naked, shepherd are indulged in competition of big building constructions. Then he went. I stayed there carefully, and then he said to me: “O Omar, do you know who the questioner? I said: Allah and His Messenger know best, he said: it is to inform you your religion.) Narrated by Muslim.