The woman shouted at Elijah, “What have I done to you? I thought you were God's prophet. Did you come here to cause the death of my son as a reminder that I've sinned against God?”
Once a year Aaron must purify the altar by smearing on its four corners the blood of an animal sacrificed for sin, and this practice must always be followed. The altar is sacred because it is dedicated to me.
You must celebrate this day each year—it is the Great Day of Forgiveness for all the sins of the people of Israel. Moses did exactly as the LORD had commanded.
However, only the high priest could go into the second part of the tent, and he went in only once a year. Each time he carried blood to offer for his sins and for any sins that the people had committed without meaning to.