‏ Leviticus 16:12-13

12And he shall take aa censer full of coals of fire from the altar before the Lord, and two handfuls of sweet incense beaten small, and he shall bring it inside the veil 13 band put the incense on the fire before the Lord, that the cloud of the incense may cover cthe mercy seat that is over the testimony, so that he does not die.
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