Isaiah
Isaiah 25:9ESV·traditional attribution

It will be said on that day, “Behold, this is our God; we have waited for him, that he might save us. This is the LORD; we have waited for him; let us be glad and rejoice in his salvation.”

John Calvin Reformed @genevareformer

9. And it shall be said. The verb אמר (āmăr) is indefinite, “He shall say;” but as the discourse does not relate to one or another individual, but to all in general, I chose to render it in a passive form. {Bogus footnote} This is an excellent conclusion; for it shews that God’s benefits are not in any respect doubtful or uncertain, but are actually received and enjoyed by men.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The welcome which the church shall give to these blessings promised in the foregoing verses (Isa 25:9): It shall be said in that day, with a humble holy triumph and exultation, Lo, this is our God; we have waited for him! Thus will the deliverance of the church out of long and sore troubles be celebrated; thus will it be as life from the dead.

Commenting on Isaiah 25:9-12

John Gill Reformed Baptist @doctorgill

And it shall be said in that day,.... When the feast will be made for all the Lord's people; when the veil and covering shall be removed; when death will be swallowed up in victory; when all tears shall be wiped away from the saints; when their rebuke shall be taken away from them; all which will be at the glorious appearing of Christ.