Sing, O ye heavens; for the LORD hath done it.. – Isaiah 44:23

It is sweet to reflect that redemption is an accomplished fact. It is not “The Lord will do it,” but “The Lord hath done it.” …I have to-day to speak of a matter of history-“The Lord hath done it”; He who was the offended one has provided a propitiation; His own deed of transcendent grace has scattered the thick clouds of sin and poured eternal day upon the darkened earth. Jesus has bled and died and vanquished sin thereby. Our glorious Samson lay asleep in the Gaza of the tomb, and His foes thought they had Him fast for ever; but He awoke before the morning light, and He pulled up the gates of death and hell, post and bar and all, and carried them away, leading captivity captive. He hath done it, our divine Deliverer has spoiled death and the grave for us. “Sing, O ye heavens: shout, ye lower parts of the earth.” The Breaker is gone up before us, and our King is at the head of us; He hath broken up and cleared a pathway straight from the tomb to the throne of God. Glory be to His name; He has done it.

Then sinner, listen. Your sin can be blotted out…O man, those fetters are not, after all, eternal, they may be snapped; the bars in yonder window may be torn out so that you can escape into liberty. Begin to sing, then! Alas, I know you will not because I bid you, nor at any man’s bidding, till grace sets you free. The only thing to make you sing is for you to realize salvation; and oh, may you do so at this moment by believing in Jesus. Have done with everything but Christ and drop into His arms! Rest in Him; trust Him; depend upon Him, and all is well, and then will you cry aloud, “Sing, O ye heavens, for the Lord hath done it.”~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1240.cfm