2 Bible Verses About Sex Before Marrage (KJV)

20 But if this thing be true, and the tokens of virginity be not found for the damsel: 21 Then they shall bring out the damsel to the door of her father’s house, and the men of her city shall stone her with stones that she die: because she hath wrought folly in Israel, to play the whore in her father’s house: so shalt thou put evil away from among you.

4 Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.