Exodus 27:21
In the Tent of Meeting, outside the veil that is in front of the Testimony, Aaron and his sons are to tend the lamps before the LORD from evening until morning. This is to be a perpetual statute for the Israelites throughout their generations.

Exodus 30:7
And Aaron is to burn fragrant incense on it every morning when he tends the lamps.

Exodus 30:9
On this altar you must not offer unapproved incense or a burnt offering or grain offering, nor are you to pour a drink offering on it.

1 Samuel 2:28
And out of all the tribes of Israel I selected your father to be My priest, to offer sacrifices on My altar, to burn incense, and to wear an ephod in My presence. I also gave to the house of your father all the offerings of the Israelites made by fire.

2 Chronicles 26:18
They took their stand against King Uzziah and said, "Uzziah, you have no right to offer incense to the LORD. Only the priests, the descendants of Aaron, are consecrated to burn incense. Leave the sanctuary, for you have acted unfaithfully; you will not receive honor from the LORD God."

Psalm 141:2
May my prayer be set before You like incense, my uplifted hands like the evening offering.