Exodus 30:6-10
Exodus 30:6
You shall put this altar in front of the veil that is near the ark of the testimony, in front of the atoning cover that is over the ark of the testimony, where I will meet with you.
Exodus 30:7
Aaron shall burn fragrant incense on it; he shall burn it every morning when he trims the lamps.
Exodus 30:8
And when Aaron sets up the lamps at twilight, he shall burn incense. There shall be perpetual incense before the Lord throughout your generations.
Exodus 30:9
You shall not offer any strange incense on this altar, or burnt offering, or meal offering; and you shall not pour out a drink offering on it.
Exodus 30:10
However, Aaron shall make atonement on its horns once a year; he shall make atonement on it with the blood of the sin offering of atonement once a year throughout your generations. It is most holy to the Lord.”