Numbers 21:5-8

⁵The people spoke against God and Moses: “Why have you brought us up out of Egypt to die in the wilderness? There is no bread, no water, and we hate this miserable food.”

⁶Then Yahweh sent poisonous snakes among the people. The snakes bit the people; many people died.

⁷The people came to Moses and said, “We have sinned because we have spoken against Yahweh and you. Pray to Yahweh for him to take the snakes away from us.” So Moses prayed for the people.

⁸Yahweh said to Moses, “Make a snake and attach it to a pole. It will happen that everyone who is bitten will survive, if he looks at it.”