Blood played an important role in the sacrificial worship of ancient Israel. Leviticus 16 describes how the high priest used sacrificial blood during the Day of Atonement to purify the sanctuary from the uncleanness and transgressions of the people. The blood of the designated goat was brought into the Most Holy Place and sprinkled according to the prescribed ritual.
Leviticus 17:11 explains the significance of blood by associating it with the life of the creature and with the atoning purpose God assigned to it upon the altar. These instructions established an important relationship between life, sacrifice, purification, and reconciliation with God.