Christ hath redeemed us from the curse of the law, being made a curse for us… – Galatians 3:13

Some of you, my dear friends, will be able to follow me in your experience, while I just remind you how it was, that in your salvation Christ removed the curse. You will agree with me when I say that the removal of the curse from us is done in a moment. It is an instantaneous thing. I may stand here one moment under the curse; and if the Spirit look upon me, and I breathe a prayer to heaven-if by faith I cast myself on Jesus-in one solitary second, ere the clock hath ticked, my sins may be all forgiven. Hart sung truly, when he said-

“The moment a sinner believes,
And trusts in his crucified God,
His pardon at once he receives,
Salvation is full through His blood.”

We do not say that the great work of conversion is instantaneous; that may take some time; for Christ commences in the heart a work, which is to be carried on through life in sanctification; but the justification, the taking away the curse, is done in a single moment. “Unwrite the curse,” says God. It is done. The acquittal is signed and sealed; it taketh not long.

“Fully discharged by Christ I am,
From sin’s tremendous curse and blame.”

We may be fully absolved in a moment.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3254.cfm