Numbers 21:8-9

21:8 The Lord said to Moses, “Make a poisonous snake and set it on a pole. When anyone who is bitten looks at it, he will live.” 21:9 So Moses made a bronze snake and put it on a pole, so that if a snake had bitten someone, when he looked at the bronze snake he lived.

John 3:14-15

3:14 Just as Moses lifted up the serpent in the wilderness, so must the Son of Man be lifted up, 3:15 so that everyone who believes in him may have eternal life.”