'Serpent' in the Bible

and the people come in unto Moses and say, 'We have sinned, for we have spoken against Jehovah, and against thee; pray unto Jehovah, and He doth turn aside from us the serpent;' and Moses prayeth in behalf of the people.

And the LORD said unto Moses, Make thee a fiery serpent, and set it upon a pole: and it shall come to pass, that every one that is bitten, when he looketh upon it, shall live.

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