'Be Holy' in the Bible

‘All the time of the vow of his separation no razor shall be used on his head. Until the time of his separation to the Lord is completed, he shall be holy, and shall let the hair of his head grow long.

so that you may remember to do all My commandments and be holy (set apart) to your God.

then put fire in them and place incense on them in the presence of the Lord tomorrow; and the man whom the Lord chooses shall be the one who is holy. You have gone far enough, you sons of Levi.”

You shall eat it as the most holy thing; every male [of your family] shall eat it. It shall be holy to you.