Exodus 30:10 "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."

Exodus 30:12 "When you take a census of the sons of Israel to number them, then each one of them shall give a ransom for himself to the LORD, when you number them, so that there will be no plague among them when you number them. (NASB ©1995)