What song will we sing in eternity in the book of Revelation?
In the eternal state described in Revelation, the redeemed will sing the song of Moses, identified as the song of redemption. It celebrates that the battles are over and that we have now attained the purpose to which God has been bringing us all along.
Les explains that Exodus 15 records the song of Moses, when Moses and the children of Israel sang after crossing the Red Sea and seeing the Egyptians drowned. He says he will not take time to read it, but calls it rather important because when we get to the book of Revelation and into the eternal state, the song we will sing is the song of Moses. He identifies it as the song of redemption, celebrating that the battles are over and that we have now attained that to which God has been bringing us all along. He encourages studying it in spare time, then moves on to verse 22, where Moses brought Israel from the Red Sea toward the wilderness of Shur and Mount Sinai.
And they sing the song of Moses the servant of God, and the song of the Lamb, saying, Great and marvellous are thy works, Lord God Almighty; just and true are thy ways, thou King of saints.