Azazel was cast out of Heaven after he taught men how to make swords, knives, shields and breastplates; and made known to them the metals of the earth and the art of working them; and all kinds of costly stones and all colouring tinctures. Because of this, the humans became corrupted and viewed themselves as invincible with such tools . The corruption brought on by Azazel and the Grigori degrades the human race, and the four archangels being Michael, Gabriel, Raphael, and Uriel were stated to have witnessed much blood being shed upon the earth and all lawlessness being wrought upon the earth.
The humans even went so far as to demand the angels above to have an audience with God, and to raid Heaven itself in order to learn the secrets of Paradise and the ones that God holds.
When God saw what Azazel's actions have wrought he told Raphael to bind Azazel's hand and foot and cast him into the darkness: and make an opening in the desert and toss him therein. He would then place upon him rough and jagged rocks, and cover him with darkness, and let him abide there forever, and cover his face that he may not see light.
During Judgement Day, it is said that those who followed Azazel's ways by misusing the purpose of weapons such as swords, will be cast into a lake of fire alongside Azazel himself.