Exodus 30:7

and he burned fragrant incense on it, just as Yahweh had commanded Moses.

one gold pan of 10 shekels, full of incense;

as a memorial to the sons of Israel that no outsider who is not of the seed of Aaron should come near to burn incense before Yahweh; so that he will not become like Korah and his congregation—just as Yahweh had spoken to him by the hand of Moses.

‘And did I not choose them from all the tribes of Israel to be My priests, to go up to My altar, to burn incense, to carry an ephod before Me; and did I not give to the house of your father all the fire offerings of the sons of Israel?

But Aaron and his sons offered offerings up in smoke on the altar of burnt offering and on the altar of incense, for all the work of the Holy of Holies, and to make atonement for Israel, according to all that Moses the servant of God had commanded.

The sons of Amram were Aaron and Moses. And Aaron was separated in order to sanctify him as most holy, he and his sons forever, to offer offerings up in smoke before Yahweh, to minister to Him and to bless in His name forever.

and for the altar of incense refined gold by weight; and gold for the pattern of the chariot, even the cherubim that spread out their wings and covered the ark of the covenant of Yahweh.

“Behold, I am about to build a house for the name of Yahweh my God, setting it apart to Him as holy, to burn fragrant incense before Him and to set out the showbread continually, and to offer burnt offerings morning and evening, on sabbaths and on new moons and on the appointed feasts of Yahweh our God, this being required forever in Israel.

And they stood against Uzziah the king and said to him, “It is not for you, Uzziah, to burn incense to Yahweh, but for the priests, the sons of Aaron who are set apart as holy to burn incense. Get out of the sanctuary, for you have been unfaithful and will have no honor from Yahweh God.”

according to the custom of the priestly office, he was chosen by lot to enter the sanctuary of the Lord and burn incense.