'Be Holy' in the Bible

All the days of the vow of his separation there shall no razor come upon his head: until the days shall be fulfilled, in which he separateth himself to the LORD, he shall be holy, and shall let the locks of the hair of his head grow.

That ye may remember, and do all my commandments, and be holy to your God.

And put fire in them, and put incense in them before the LORD to-morrow: and it shall be that the man whom the LORD doth choose, he shall be holy: ye take too much upon you, ye sons of Levi.

In the most holy place shalt thou eat it; every male shall eat it: it shall be holy to thee.