Jeremiah
Jeremiah 33:8ESV·traditional attribution

I will cleanse them from all the guilt of their sin against me, and I will forgive all the guilt of their sin and rebellion against me.

John Calvin Reformed @genevareformer

He says first, that he would cleanse themfrom all iniquity, and then, that he would be propitious to all their iniquities He no doubt repeats the same thing; but the words are not superfluous, for it was necessary seriously to remind the Jews of their many vices, of which indeed they were conscious, and yet they did not repent.

Matthew Henry Presbyterian @wholebiblehenry

Observe here, I. The date of this comfortable prophecy which God entrusted Jeremiah with. It is not exact in the time, only that it was after that in the foregoing chapter, when things were still growing worse and worse; it was the second time. God speaketh once, yea, twice, for the encouragement of his people.

Commenting on Jeremiah 33:1-9

John Gill Reformed Baptist @doctorgill

And I will cleanse them from all their iniquity, whereby they have sinned against me,.... Even by the blood of Christ, which cleanses from all sin, of heart, lip, and life, in allusion to the purifications under the law, Jo1 1:7; see Eze 36:25; and I will pardon all their iniquities, whereby they have sinned, and whereby they have transgressed against me; for Christ's sake...