1 Corinthians 3:16-17
16 Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you?
17 If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are.
The Grace New Testament Commentary - 1 Corinthians 3:16-17
3:16-17 Paul offers a rebuke to his readers when he asks them, do you not know that you are the temple of God and that the Spirit of God dwells in you? The expression do you not know appears nine more times and introduces an indisputable statement (cf. 1 Corinthians 5:6; 6:2-3, 9, 15-16, 19; 9:13, 24). The word temple (naos) refers to the Most Holy Place rather than the whole temple area (hieron). Paul addresses all the Corinthian believers here. The you is plural. The temple of God is the church (though in a different context Paul uses the same word to designate the body of individual believers [1 Corinthians 6:19]).
Paul says, if anyone defiles (i.e., destroys) the temple (the church)... God will destroy him. If a believer destroys the church, God's temple, by creating envy, strife, and divisions (cf. v 3), God will destroy him. That is, temporal judgment awaits the believer who creates divisions in the church because "the temple of God is holy, which temple you are".