Numbers 21:7-9

71So the people came to Moses and said, “We have sinned, because we have spoken against the Lord and against you; 2intercede with the Lord, that He will remove the serpents from us.” And Moses interceded for the people. 8Then the Lord said to Moses, “3Make a 4fiery serpent, and put it on a flag pole; and it shall come about, that everyone who is bitten, and looks at it, will live.” 9So Moses made a 5bronze serpent and put it on the flag pole; and it came about, that if a serpent bit someone, and he looked at the bronze serpent, he lived.