Atonement: Day of How Observed

Once a year Aaron shall make atonement on the horns of the altar. Throughout your generations he shall make atonement on it annually with the blood of the sin offering of atonement. The altar is most holy to the LORD.”

And the LORD said to Moses: “Tell your brother Aaron not to enter freely into the Most Holy Place behind the veil in front of the mercy seat on the ark, or else he will die, because I appear in the cloud above the mercy seat. …

“The tenth day of this seventh month is the Day of Atonement. You shall hold a sacred assembly and humble yourselves, and present a food offering to the LORD. …

On the tenth day of this seventh month, you are to hold a sacred assembly, and you shall humble yourselves; you must not do any work. …

By now much time had passed, and the voyage had already become dangerous because it was after the Fast. So Paul advised them,

That is why he is obligated to offer sacrifices for his own sins, as well as for the sins of the people.

But only the high priest entered the second room, and then only once a year, and never without blood, which he offered for himself and for the sins the people had committed in ignorance.

For when Moses had proclaimed every commandment of the law to all the people, he took the blood of calves and goats, along with water, scarlet wool, and hyssop, and sprinkled the scroll and all the people,

According to the law, in fact, nearly everything must be purified with blood, and without the shedding of blood there is no forgiveness.