Numbers 19:4

and Eleazar, the priest, as the presumptive successor of his father in the office of high priest, shall take of her blood with his finger, after it had been brought to the Sanctuary and kept from coagulating by constant stirring, and sprinkle of her blood directly before the Tabernacle of the Congregation seven times. By this rite the slain animal became a sacrifice, a sin-offering. In order to remind the congregation that death is the wages of sin, this antidote against the uncleanness of death was taken from a sin-offering. The life of the slain beast, sacrificed for the sin of the congregation, was thus delivered to the Lord, to signify that death itself was rendered powerless by the death of this most perfect blooming life.