"Then make a small altar out of acacia wood for burning incense.
It must be eighteen inches square and three feet high, with horns at the corners carved from the same piece of wood as the altar.
References for Exodus 30:2
Overlay the top, sides, and horns of the altar with pure gold, and run a gold molding around the entire altar.
Beneath the molding, on opposite sides of the altar, attach two gold rings to support the carrying poles.
The poles are to be made of acacia wood and overlaid with gold.
Place the incense altar just outside the inner curtain, opposite the Ark's cover -- the place of atonement -- that rests on the Ark of the Covenant. I will meet with you there."
References for Exodus 30:6
"Every morning when Aaron trims the lamps, he must burn fragrant incense on the altar.
And each evening when he tends to the lamps, he must again burn incense in the LORD's presence. This must be done from generation to generation.
Do not offer any unholy incense on this altar, or any burnt offerings, grain offerings, or drink offerings."
"Once a year Aaron must purify the altar by placing on its horns the blood from the offering made for the atonement of sin. This will be a regular, annual event from generation to generation, for this is the LORD's supremely holy altar."