'Be Holy' in the Bible

" 'All the days of the vow of his separation a razor will not pass over his head. Until fulfilling the days that he separated himself to Yahweh he will be holy and grow long the locks of the hair of his head.

He will be holy for Yahweh all the days of his separation.

so that you will remember and do all my commandments, and you will be holy for your God.