Numbers 21:6-9

6So the Lord sent poisonous snakes among the people, and many were bitten and died.

7Then the people came to Moses and cried out, “We have sinned by speaking against the Lord and against you. Pray that the Lord will take away the snakes.” So Moses prayed for the people.

8Then the Lord told him, “Make a replica of a poisonous snake and attach it to a pole. All who are bitten will live if they simply look at it!”

9So Moses made a snake out of bronze and attached it to a pole. Then anyone who was bitten by a snake could look at the bronze snake and be healed!