Exodus 30:9

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

7 Aaron shall burn incense of sweet spices on it every morning. When he tends the lamps, he shall burn it.

8 When Aaron lights the lamps at evening, he shall burn it, a perpetual incense before Yahweh throughout your generations.

9 You shall offer no strange incense on it, nor burnt offering, nor meal-offering; and you shall pour no drink-offering on it.

10 Aaron shall make atonement on its horns once in the year; with the blood of the sin offering of atonement once in the year he shall make atonement for it throughout your generations. It is most holy to Yahweh."

11 Yahweh spoke to Moses, saying,

12 "When you take a census of the children of Israel, according to those who are numbered among them, then each man shall give a ransom for his soul to Yahweh, when you number them; that there be no plague among them when you number them.