Exod 30:10

“Therefore, if I should consider how the true "high priest," my Lord Jesus Christ, having indeed been placed in the flesh, was with the people all year, that year about which he himself says, "He sent me to proclaim good news to the poor and to announce the acceptable year of the Lord and the day of forgiveness," I perceive how "once" in this "year" on the Day of Atonement he enters into "the Holy of Holies." That is, when with his dispensation fulfilled "he penetrates the heavens" and goes to the Father to make atonement for the human race and prays for all those who believe in him. Knowing this atonement by which he propitiates the Father for humans, the apostle John says, "I say this, little children, that we may not sin. But if we should sin, we have an advocate before the Father, Jesus Christ the just; and he himself is the propitiation for our sins." But Paul also in a similar way mentions this atonement when he says concerning Christ, "Whom God appointed as a propitiator by his blood through faith." Therefore the Day of Atonement remains for us until the sun sets; that is, until the world comes to an end.”

“וכפר אהרן AND AARON SHALL MAKE EXPIATION — This refers to the placing of the blood upon the horns of the altar. אחת בשנה ONCE IN THE YEAR — On the Day of Atonement. This is what is said in the section אחרי מות, which describes the sacrificial service on that day, (Leviticus 16:18) “And he shall go out unto the altar that is before the Lord and make an expiation upon it”. חטאת הכפרים SIN-OFFERING OF EXPIATION — These are the bullock and goat of the Day of Atonement which atone for the uncleanness of the Sanctuary and its holy offerings (Shevuot 2b; cf. Rashi on Leviticus 16:11). קדש קדשים [IT IS] MOST HOLY — the altar is sanctified for offering on it these things alone and not for any other sacrificial service.”