'Crooked' in the Bible

In that day lay a charge doth Jehovah, With his sword -- the sharp, and the great, and the strong, On leviathan -- a fleeing serpent, And on leviathan -- a crooked serpent, And He hath slain the dragon that is in the sea.

Every valley is raised up, And every mountain and hill become low, And the crooked place hath become a plain, And the entangled places a valley.

'I go before thee, and crooked places make straight, Two-leaved doors of brass I shiver, And bars of iron I cut asunder,