Exodus 30:10-12

Amplified Bible

¹⁰ Once a year Aaron shall make atonement [for sin] on its horns. 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.”

The Ransom Money

¹¹ Then the Lord said to Moses, ¹² “When you take the census of the Israelites, each one shall give a ransom for himself to the Lord when you count them, so that no plague will come on them when you number them.^(A)