Ezra 3:11

And they sang together by course
They sang by turns in responses, and answered one another, as the word signifies; when one company had performed their part, another took theirs:

in praising and giving thanks to the Lord;
for returning them to their own land, and giving them opportunity, ability, and will, to set about the rebuilding of the temple of the Lord, and restoring the pure worship of God;

because he is good, for his mercy endureth for ever towards Israel;
which words are often repeated in ( Psalms 136:1-26 ) and which might be the psalm the Levites now sung by responses:

and all the people shouted with a great shout when they praised the
Lord;
to express their joy, in the best manner they could, on this solemn occasion:

because the foundation of the house of the Lord was laid;
which gave them hope the temple in due time would be rebuilt, and the service of it restored; see ( Job 38:6 Job 38:7 ) .