Leviticus 1:16

The angel answered, "The Holy Spirit will come upon you and the power of the Highest [i.e., God] will overshadow you. Therefore, the child you carry will be called the holy Son of God.

These people have been [specially] selected, and [their acceptance was] pre-planned by God the Father, and they were set apart through [the work of] the Holy Spirit. This resulted in their obedience and sprinkling [Note: This is a figurative reference to the Old Testament practice of cleansing, See Exodus 24:7-8] by the blood of Jesus Christ. May God's unearned favor and peace be continually upon you.

For the blood of the animals offered as sacrifices for sin is brought by the head priest into the Holy of Holies, [but] their bodies are burned outside of the camp.