Revelation 1:5
1:5 and from Jesus Christ – the faithful witness, the firstborn from among the dead, the ruler over the kings of the earth. To the one who loves us and has set us free from our sins at the cost of his own blood
Revelation 5:9
5:9 They were singing a new song: “You are worthy to take the scroll
and to open its seals
because you were killed,
and at the cost of your own blood you have purchased for God
persons from every tribe, language, people, and nation.