Acts 20:28
"Take heed to yourselves and to all the flock among which the Holy Spirit has placed you to take the oversight for Him and act as shepherds to the Church of God, which He has bought with His own blood.
Titus 2:14
who gave Himself for us to purchase our freedom from all iniquity, and purify for Himself a people who should be specially His own, zealous for doing good works.
Revelation 5:9
And now they sing a new song. "It is fitting," they say, "that Thou shouldst be the One to take the book And break its seals; Because Thou hast been offered in sacrifice, And hast purchased for God with Thine own blood Some out of every tribe and language and people and nation,