'Be Holy' in the Bible

There is a difference also between a wife and a virgin. The unmarried woman is concerned about the things of the Lord, that she may be holy in body and in spirit; but she that is married, is concerned about the things of the world, how she may please her husband.

according as he chose us in him before the foundation of the world, that we should be holy and blameless before him in love,

in order that he might present it to himself a glorious church, having neither stain, nor wrinkle, nor any such thing; but that it should be holy and without blemish.

He that is unjust, let him be unjust still; he that is polluted, let him be polluted still; and he that is righteous, let him be righteous still; and he that is holy, let him be holy still.