John 3:14

And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up,

Surrounding context

3:13 No one has ascended to heaven but He who came down from heaven, that is, the Son of Man who is in heaven.

3:14 And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up,

3:15 that whoever believes in Him should not perish but have eternal life.