Exodus 30:6-8

6Place the altar in front of the veil that is before the ark of the Testimony1—before the mercy seat that is over the Testimony—where I will meet with you. 7And Aaron is to burn fragrant incense on it every morning when he tends the lamps. 8When Aaron sets up the lamps at twilight,2 he must burn the incense perpetually before the LORD for the generations to come.