In unnecessary matters be not over curious, and in many of his works thou shalt not be inquisitive. For many things are shewn to thee above the understanding of men. Ecclesiasticus / Sirach 3:24
Whoso is wont to think (through envy) that Allah will not give him (Muhammad) victory in the world and the Hereafter ... let him stretch a rope up to the roof (of his dwelling), and let him hang himself. 22:15
But as for those who disbelieve, garments of fire will be cut out for them; boiling fluid will be poured down on their heads, Whereby that which is in their bellies, and their skins too, will be melted; And for them are hooked rods of iron. 22:19
Those who strive to thwart Our revelations, such are rightful owners of the Fire. 22:51