Key-word, “Passover;” Key-verse,12:23.-This is the book of the exode or departure. By a series of ten plagues, God delivers his elect nation from bondage in Egypt. Blood now becomes the sign and pledge of redemption. The word “passover” has a threefold significance: God passed over the blood-sprinkled houses; then he caused to pass over, or be set apart to himself, all first-born (13:12, margin); and he made Israel to pass over the Red Sea (15:16). [p. 3] HBS 36.3