Leviticus 16:12, 13

^12 ^He shall take a censer full of burning coals of fire from off the [bronze] altar before the Lord, and his two hands full of sweet incense beaten small, and bring it within the veil [into the Holy of Holies],

^13 ^And put the incense on the fire [in the censer] before the Lord, that the cloud of the incense may cover the mercy seat that is upon [the ark of] the Testimony, lest he die.