Numbers 21:4-9

Then they journeyed from Mount Hor by the way to the Red Sea, to go around the land of Edom; and the people became impatient on the way. ⁵ And the people spoke against God and against Moses, Why have you brought us up out of Egypt to die in the wilderness? For there is no food and there is no water; and our soul loathes this light bread. ⁶ Then Jehovah sent fiery serpents among the people, and they bit the people, so that many people of Israel died. ⁷ And the people came to Moses and said, We have sinned, because we have spoken against Jehovah and against you; pray to Jehovah, that He may take away the serpents from us. So Moses prayed for the people. ⁸ Then Jehovah said to Moses, Make a fiery serpent, and set it on a pole; and everyone who is bitten, when he sees it, shall live. ⁹ And Moses made a bronze serpent and set it on the pole; and if a serpent had bitten any man, when he looked at the bronze serpent, he lived.

— Numbers 21:4-9