Leviticus 10:3

“Also let the priests who come near to Yahweh set themselves apart as holy, lest Yahweh break out against them.”

and he spoke to Korah and all his congregation, saying, “Tomorrow morning Yahweh will show who is His, and who is holy, and will bring him near to Himself; even the one whom He will choose, He will bring near to Himself.

So Samuel told him everything and hid nothing from him. And he said, “It is Yahweh; let Him do what seems good in His eyes.”

And He has raised up a horn for His people, Praise for all His holy ones; For the sons of Israel, a people near to Him. Praise Yah!

but the chamber which faces toward the north is for the priests who keep the responsibility of the altar. These are the sons of Zadok, who from the sons of Levi come near to Yahweh to minister to Him.”

Then he said to me, “The north chambers and the south chambers, which are opposite the separate area, they are the holy chambers where the priests who are near to Yahweh shall eat the most holy things. There they shall lay the most holy things, the grain offering, the sin offering, and the guilt offering; for the place is holy.