'Dragon' in the Bible

In that day the Lord, with his great and strong and cruel sword, will send punishment on Leviathan, the quick-moving snake, and on Leviathan, the twisted snake; and he will put to death the dragon which is in the sea.

Awake! awake! put on strength, O arm of the Lord, awake! as in the old days, in the generations long past. Was it not by you that Rahab was cut in two, and the dragon Wounded?