'Covenant blood' in the Bible

As for you also, because of the blood of My covenant with you [My chosen people, the covenant that was sealed with blood]I have freed your prisoners from the waterless pit.

For this is my Covenant blood, which is poured out for many for the forgiveness of sins.

"This is my Covenant-blood," he said, "which is poured out on behalf of many.

How much severer punishment, think you, will he be held to deserve who has trampled under foot the Son of God, has not regarded as holy that Covenant-blood with which he was set free from sin, and has insulted the Spirit from whom comes grace?