Exodus 30:6-8

6And you shall put it before the veil that is before the ark of the Testimony, before the mercy seat that is over the Testimony, where I will meet with you.

7“Aaron shall burn on it sweet incense every morning; when he tends the lamps, he shall burn incense on it.

8And when Aaron lights the lamps at twilight, he shall burn incense on it, a perpetual incense before the Lord throughout your generations.