'Serpents' in the Bible

For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods.

And the LORD sent fiery serpents among the people, and they bit the people; and much people of Israel died.

Therefore the people came to Moses, and said, We have sinned, for we have spoken against the LORD, and against thee; pray unto the LORD, that he take away the serpents from us. And Moses prayed for the people.

Who led thee through that great and terrible wilderness, wherein were fiery serpents, and scorpions, and drought, where there was no water; who brought thee forth water out of the rock of flint;

They shall be burnt with hunger, and devoured with burning heat, and with bitter destruction: I will also send the teeth of beasts upon them, with the poison of serpents of the dust.

For, behold, I will send serpents, cockatrices, among you, which will not be charmed, and they shall bite you, saith the LORD.