Numbers 21:7-9

Then the people came to Moses and said, “We have sinned in complaining against the LORD and you. Pray to the LORD to take the serpents from us.” So Moses prayed for the people, and the LORD said to Moses: Make a seraph and mount it on a pole, and everyone who has been bitten will look at it and recover. Accordingly Moses made a bronze serpent and mounted it on a pole, and whenever the serpent bit someone, the person looked at the bronze serpent and recovered. Journey Around Moab.