New Defender's Study Bible Notes
15:3 song of the Lamb. “The song of Moses” (Exodus 15:1) celebrated the ancient deliverance of the people of God by the Red Sea, just as Noah had been delivered very long ago by the great flood. The song of the Lamb (Revelation 5:9) similarly celebrated the imminent deliverance of the whole world by the Lamb, whose death and resurrection was the price of the world’s redemption from its captivity by Satan. This redemption is symbolized by the waters of baptism (compare I Corinthians 10:1-2; I Peter 3:18-22; Romans 6:3-4). In the eternal earth there will be “no more sea” (Revelation 21:1), but there will always be a remembrance of these great deliverances, and this will be memorialized by the crystal sea at the heavenly throne (Revelation 15:2).
15:3 King of saints. Although some manuscripts read “king of nations” or “king of ages” here, the weight of textual evidence favors “King of saints,” and this is more appropriate in the context. The victorious Lamb is recognized as King of all His saints, whether from the pre-Flood world, the chosen people Israel, the church age, or finally from the time of the tribulation.