John 3:6

6Thatτὸhaving been bornγεγεννημένονofἐκtheτῆςfleshσαρκὸςfleshσάρξisἐστιν,andκαὶthatτὸhaving been bornγεγεννημένονofἐκtheτοῦSpiritπνεύματοςspiritπνεῦμάisἐστιν.

That having been born of the flesh is flesh, and that having been born of the Spirit is spirit.