Isaiah 25:9

And it shall be said— This verse contains the proposition of the antistrophe, or antiphonal part of this doxology, wherein the people may be supposed to sing in reply to the former part, which as we have observed, was the song of the elders. It was to be sung on that day, or at that time, in which God had wrought his wonders for the salvation of his people. The expressions are strong and glowing, and are well suited to that state of mind which is the consequence of high favours and signal deliverances vouchsafed from God.