Augustine of Hippo, on Ps 149:1

“Sing ye to the Lord a new canticle: let his praise be in the church of the saints.”

“O brothers, o sons, o Catholic offspring, o holy and celestial seeds, o regenerated in Christ and born from above, listen to me, rather through me: Sing to the Lord a new song. "Look," you say, "I sing." You sing, indeed you sing, I hear. But let life not contradict the testimony of the tongue. Sing with voices, sing with hearts, sing with mouths, sing with lifestyles: Sing to the Lord a new song. Are you asking what you should sing about him whom you love? Without a doubt, you want to sing about him whom you love. You seek his praises to sing. You have heard: Sing to the Lord a new song. Are you seeking praises? His praise is in the congregation of the saints. The praise of singing is the singer himself. Do you want to speak praises to God? Be yourselves what you say. You are his praise if you live well. For his praise is not in the synagogues of the Jews, not in the madness of the pagans, not in the errors of the heretics, not in the applause of the theaters. Are you looking for where it is? Pay attention, be yourselves: His praise is in the congregation of the saints.”

Imported from an open dataset — not yet checked against the printed edition.