Hebrews 9:15-20

9:15 And so he is the mediator of a new covenant, so that those who are called may receive the eternal inheritance he has promised, since he died to set them free from the violations committed under the first covenant. 9:16 For where there is a will, the death of the one who made it must be proven. 9:17 For a will takes effect only at death, since it carries no force while the one who made it is alive. 9:18 So even the first covenant was inaugurated with blood. 9:19 For when Moses had spoken every command to all the people according to the law, he took the blood of calves and goats with water and scarlet wool and hyssop and sprinkled both the book itself and all the people, 9:20 and said, “This is the blood of the covenant that God has commanded you to keep.”

Hebrews 9:28

9:28 so also, after Christ was offered once to bear the sins of many, to those who eagerly await him he will appear a second time, not to bear sin but to bring salvation.