What is the story of blacksmith Khabbab (saw), who made a sword for Al-`Asi bin Wail As-Sahmi and was asked to deny his faith in Prophet Muhammad (peace be upon him) in exchange?
 Narrated Khabbab:                     I was a blacksmith in Mecca Once I made a sword for Al-`Asi bin Wail As-Sahmi. When I went to demand its price, he said, "I will not give it to you till you disbelieve in Muhammad." I said, "I shall not disbelieve in Muhammad till Allah make you die and then bring you to life again." He said, "If Allah should make me die and then resurrect me and I would have wealth and children." So Allah revealed:-- 'Have you seen him who disbelieved in Our Signs, and (yet) says I shall certainly be given wealth and children? Has he known the unseen or has he taken a covenant from (Allah) the Beneficent?' (19.77- 78)