1 Thessalonians 4:3-6

For this is the will of God, that you be sanctified [separated and set apart from sin]: that you abstain and back away from sexual immorality; that each of you know how to control his own body in holiness and honor [being available for God’s purpose and separated from things profane], not [to be used] in lustful passion, like the Gentiles who do not know God and are ignorant of His will; and that [in this matter of sexual misconduct] no man shall transgress and defraud his brother because the Lord is the avenger in all these things, just as we have told you before and solemnly warned you.