John 3:14-15

And [just] like Moses lifted up the snake [on the pole] in the wilderness [Num. 21:9], so the Son of man must be lifted up [on the cross]

Treasury of Scripture Knowledge

Summary

He removed the high places, and brake the images, and cut down the groves, and brake in pieces the brasen serpent that Moses had made: for unto those days the children of Israel did burn incense to it: and he called it Nehushtan.

The brasen serpent

Bible References

The brasen serpent

John 3:14
And [just] like Moses lifted up the snake [on the pole] in the wilderness [Num. 21:9], so the Son of man must be lifted up [on the cross]