Revelation 12:11 ESV
And they have conquered him by the blood of the Lamb and by the word of their testimony, for they loved not their lives even unto death.

Matthew 26:28 ESV
For this is my blood of the covenant, which is poured out for many for the forgiveness of sins.

Acts 20:28 ESV
Pay careful attention to yourselves and to all the flock, in which the Holy Spirit has made you overseers, to care for the church of God, which he obtained with his own blood.

Revelation 7:14 ESV
I said to him, “Sir, you know.” And he said to me, “These are the ones coming out of the great tribulation. They have washed their robes and made them white in the blood of the Lamb.

Revelation 5:9 ESV
And they sang a new song, saying, “Worthy are you to take the scroll and to open its seals, for you were slain, and by your blood you ransomed people for God from every tribe and language and people and nation,

So Christ has now become the High Priest over all the good things that have come. He has entered that greater, more perfect Tabernacle in heaven, which was not made by human hands and is not part of this created world. With his own blood—not the blood of goats and calves—he entered the Most Holy Place once for all time and secured our redemption forever. Under the old system, the blood of goats and bulls and the ashes of a heifer could cleanse people’s bodies from ceremonial impurity. Just think how much more the blood of Christ will purify our consciences from sinful deeds so that we can worship the living God. For by the power of the eternal Spirit, Christ offered himself to God as a perfect sacrifice for our sins. That is why he is the one who mediates a new covenant between God and people, so that all who are called can receive the eternal inheritance God has promised them. For Christ died to set them free from the penalty of the sins they had committed under that first covenant.
Hebrews 9:11‭-‬15 NLT