Exodus 30:6-9

And you shall put it in front of the veil that is above the ark of the testimony, in front of the mercy seat that is above the testimony, where I will meet with you. And Aaron shall burn fragrant incense on it. Every morning when he dresses the lamps he shall burn it, and when Aaron sets up the lamps at twilight, he shall burn it, a regular incense offering before the LORD throughout your generations. You shall not offer unauthorized incense on it, or a burnt offering, or a grain offering, and you shall not pour a drink offering on it.