KJV:
Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body.
NASB:
Flee immorality. Every other sin that a man commits is outside the body, but the immoral man sins against his own body.
KJV:
But and if thou marry, thou hast not sinned; and if a virgin marry, she hath not sinned. Nevertheless such shall have trouble in the flesh: but I spare you.
NASB:
But if you marry, you have not sinned; and if a virgin marries, she has not sinned. Yet such will have trouble in this life, and I am trying to spare you.
KJV:
But if any man think that he behaveth himself uncomely toward his virgin, if she pass the flower of her age, and need so require, let him do what he will, he sinneth not: let them marry.
NASB:
But if any man thinks that he is acting unbecomingly toward his virgin daughter, if she is past her youth, and if it must be so, let him do what he wishes, he does not sin; let her marry.
KJV:
But when ye sin so against the brethren, and wound their weak conscience, ye sin against Christ.
NASB:
And so, by sinning against the brethren and wounding their conscience when it is weak, you sin against Christ.
KJV:
Awake to righteousness, and sin not; for some have not the knowledge of God: I speak this to your shame.
NASB:
Become sober-minded as you ought, and stop sinning; for some have no knowledge of God. I speak this to your shame.
KJV:
Be ye angry, and sin not: let not the sun go down upon your wrath:
NASB:
BE ANGRY, AND yet DO NOT SIN; do not let the sun go down on your anger,