Thematic Bible: The scourge of serpents

Then the Lord sent poisonous snakes among the people, and they bit them so that many Israelites died. The people then came to Moses and said, "We have sinned by speaking against the Lord and against you. Intercede with the Lord so that He will take the snakes away from us." And Moses interceded for the people. Then the Lord said to Moses, "Make a snake [image] and mount it on a pole. When anyone who is bitten looks at it, he will recover." read more.
So Moses made a bronze snake and mounted it on a pole. Whenever someone was bitten, and he looked at the bronze snake, he recovered.