Revelation 14:3: And they sung as it were a new song before the throne, and before the four beasts, and the elders: and no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth.

The 144,000 harpers from Revelation 14:2 sing an old song,¹ which sounds like a new song as it were.² The song is like new because conditions on earth will be new³ when the 144,000 Servants stand with Christ on heavenly mount Zion⁴ just before the Third Woe begins.⁵ The new conditions will exist as the Great Tribulation of the Second Woe comes to an end,⁶ as the redemption and resurrection of all exaltation-worthy saints has occurred,⁷ and as Christ's victory over the Second Beast is about to be complete during the Third Woe.⁸

Saints have been singing the same new song since at least the time of Christ's atonement.⁹ For example, in Revelation 5:8-9, John saw 24 Elders in celestial paradise who were deceased members of the seven churches of Asia. In that context, the 24 Elders represented the disembodied spirits of exaltation-worthy saints from Christ's ancient church.¹⁰ These 24 Elders stand on heavenly mount Zion in Revelation 14:2 and sing a new song following their resurrection at the end of the Second Woe.¹¹ In Revelation 7:9-10, John saw a great multitude of disembodied spirits in celestial paradise in the modern era who receive the gospel in the postmortal spirit world and become exaltation-worthy while awaiting their resurrection.¹² They too will sing the same new song¹³ after they receive their exalting ordinances by proxy¹⁴ and resurrect in the morning of the first resurrection.¹⁵ All disembodied spirits of exaltation-worthy people that resurrect at the Second Coming will sing the new song.¹⁶ For them, the song of the redeemed from the earth¹⁷ is both new and everlasting, just as the gospel of Jesus Christ is both new and everlasting.¹⁸

At the Second Coming, the 144,000 Servants sing the new song before the throne of God on mount Zion in heaven, which some scholars refer to as the paradise of heaven.¹⁹ They will sing the new song in the presence of, and standing before, the four beasts that represent all classes of creation.²⁰ They also sing before the 24 Elders from the seven ancient churches of Asia.²¹ However, once the 24 Elders are resurrected and fully redeemed they also become the redeemed from the earth²² and they too will be in a position to learn that song²³ because they are numbered among the 144,000 Servants.

The words of the new song are found in Doctrine and Covenants Section 84:99-102.²⁴ This triumphal song of the Lamb²⁵ celebrates Christ's redemption²⁶ (resurrection)²⁷ of all the 144,000 Servants worthy of exaltation as of the end of the Second Woe.²⁸ The 144,000 Servants have reason to celebrate in song because they will then be exalted members of the Church of the Firstborn.²⁹ This means they will be redeemed from physical death as the morning of the first resurrection resumes,³⁰ and they will then become exalted kings, priests, and Gods.³¹