John Gill Commentary John 2:21

"But he spake of the temple of his body." — John 2:21 (ASV)

But he spoke of the temple of his body .
Which was the antitype of the material temple; and might well be called so, since the bodies of the saints are called temples, (1 Corinthians 3:16 1 Corinthians 3:17) (6:19) (2 Corinthians 6:16) ; and the human nature of Christ is called a tabernacle, (Hebrews 8:2) ; and he himself, in prophecy, is said to be (vdqml) , "for a sanctuary", or temple, (Isaiah 8:14) , and that because the fulness of the Godhead dwelt in him bodily, the train of the divine perfections filled the temple of his human nature, (Colossians 2:9) (Isaiah 6:1) .

And because here, as in the temple, God grants his presence, and communes with his saints, accepts of their prayers and praises, and all their spiritual sacrifices through him; and who is the oracle, the true "Urim" and "Thummim", by whom he delivers his whole mind and will to his people.