St. John Chrysostom
“This blood was ever typified of old in the altars and sacrifices of righteous men, This is the price of the world, by This Christ purchased to Himself the Church, by This He has adorned Her all. For as a man buying servants gives gold for them, and again when he desires to deck them out does this also with gold; so Christ has purchased us with His blood, and adorned us with His blood.”
Source: St. John Chrysostom, Homily 46