Sahih Bukhari

Narrated Masruq:Khabbab said, ""During the pre-Islamic period, I was a blacksmith and Al-Asi bin Wail owed me a debt."" So Khabbab went to him to demand the debt. He said, ""I will not give you (your due) till you disbelieve in Muhammad."" Khabbab said, ""By Allah, I shall not disbelieve in Muhammad till Allah makes you die and then resurrects you."" Al-Asi said, ""So leave me till I die and then be resurrected, for I will be given wealth and children whereupon I will pay you your debt."" So this Verse was revealed:-- 'Have you seen him who disbelieved in Our Signs and, (yet) says: I shall certainly be given wealth and children