Numbers 21:5-8

They began complaining against God and Moses. The people said, “Why did you bring us out of Egypt? We will die here in the desert! There is no bread and no water! And we hate this terrible food!” So the LORD sent poisonous snakes among the people. The snakes bit the people, and many of the Israelites died. The people came to Moses and said, “We know that we sinned when we spoke against the LORD and against you. Pray to the and against you. Pray to the LORD. Ask him to take away these snakes.” So Moses prayed for them. The LORD said to Moses, “Make a bronze snake and put it on a pole. If anyone is bitten by a snake, that person should look at the bronze snake on the pole. Then that person will not die.”