TSK · Numbers 8:6

He said to the people, "Be ready by the third day. Don't have sexual relations with a woman."

At that time Yahweh set apart the tribe of Levi, to bear the ark of the covenant of Yahweh, to stand before Yahweh to minister to him, and to bless in his name, to this day.

and he will sit as a refiner and purifier of silver, and he will purify the sons of Levi, and refine them as gold and silver; and they shall offer to Yahweh offerings in righteousness.

Draw near to God, and he will draw near to you. Cleanse your hands, you sinners; and purify your hearts, you double-minded.