'Serpent' in the Bible

And Jehovah said to Moses, Make thee a fiery serpent, and set it upon a pole; and it shall come to pass, that every one that is bitten, and looketh upon it, shall live.

And Moses made a serpent of brass, and put it upon a pole; and it came to pass, if a serpent had bitten any man, and he beheld the serpent of brass, he lived.