Know ye not that your bodies are the members of Christ? shall I then take the members of Christ, and make [them] the members of an harlot? God forbid. (6:15)

--2 Corinthians--

Examine yourselves, whether ye be in the faith; prove your own selves. Know ye not your own selves, how that Jesus Christ is in you, except ye be reprobates? (13:5)

--Ephesians--

For we are members of his body, of his flesh, and of his bones. (5:30)

--1 John--

But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him. (2:5)

Hereby know we that we dwell in him, and he in us, because he hath given us of his Spirit. (4:13)