'Be Holy' in the Bible

‘All the days of his vow of separation no razor shall pass over his head. He shall be holy until the days are fulfilled for which he separated himself to the Lord; he shall let the locks of hair on his head grow long.

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

As the most holy gifts you shall eat it; every male shall eat it. It shall be holy to you.