Numbers 21:4-9

4They travelled from Mount Hor along the route to the Sea of Reeds in order to go around the land of Edom. The spirit of the people became impatient along the way.

5The people spoke against God and Moses: “Why have you brought us from Egypt to die in the wilderness, because there is no bread, no water, and our very spirits detest the despicable food?

6So Adonai sent poisonous serpents among the people, and they bit the people and many of the people of Israel died.

7The people came to Moses and said, “We sinned when we spoke against Adonai and you! Pray to Adonai for us, that He may take away the snakes!” So Moses prayed for the people.

8Adonai said to Moses, “Make yourself a fiery snake and put it on a pole. Whenever anyone who has been bitten will look at it, he will live.”

9So Moses made a bronze snake and put it on a pole, and it happened that whenever a snake bit anyone and he looked at the bronze snake, he lived.