Revelation 15:3

These martyrs sang two songs, as seems clear from the repetition of the words "the song." Moses recorded two songs in praise of God’s faithfulness and deliverance of the Israelites. Of these the one in Exodus 15 seems slightly more appropriate for these martyrs to echo than the one in Deuteronomy 32 because it is a song of victory. Nevertheless they both contain similar emphases. The song of the Lamb seems to be a song not recorded elsewhere in Scripture, though some commentators have suggested several different Psalms. Probably this song follows in Revelation 15:3-4. In the case of both songs, the genitive "of" is probably subjective: Moses and the Lamb were responsible for these songs, not the subjects of them.

"Moses celebrated a deliverance by the Lord which adumbrated a greater deliverance to come. The greater redemption eclipsed the former by a similar degree as the second redeemer transcended the first. Moses and the Lamb are no more to be bracketed than the promised land of Israel is to be equated with the kingdom of God. The unity of God’s purpose and the continuity of God’s people under both covenants include a disjunction of his action in Christ and of his people’s experience of redemption." [Note: Beasley-Murray, p. 235.]

The first part of this song extols God’s works and ways. Specifically, God’s works in judging His enemies are in view. His might makes judgment possible. His ways of judging are just and faithful. His sovereignty makes His judgment necessary and certain.