'Vipers' in the Bible

They sharpen their tongues like a serpent; the venom of vipers is on their lips. Interlude

The nursing child will play over the hole of the cobra, and the weaned child will put his hand on vipers' dens.

An oracle about the animals of the Negev: "Through a land of trouble, dryness, and distress, of lionesses and roaring lions, where there is no water, a land of vipers and darting snakes, he carries their riches on donkeys' backs, and their treasures on the humps of camels, to a nation that cannot benefit them,

Look, I'll send snakes among you, vipers that cannot be charmed, and they'll bite you."