“No other book of the New Testament is as permeated by the Old Testament as is Revelation. Although its author seldom quotes the Old Testament directly, allusions and echoes are found in almost every verse of the book.”
–G.K. Beale and Sean M. McDonough, “Revelation” in Commentary on the New Testament’s Use of the Old Testament, Eds. G.K. Beale and D.A. Carson (Grand Rapids: Baker, 2007), 1081.