For long ago, in the days of David and Asaph, there were directors for the singers and for the songs of praise and thanksgiving to God.
Then King Hezekiah and his officials ordered the Levites to sing praises to the LORD in the words of David and of Asaph
A Psalm of Asaph. Surely God is good to Israel, to those who are pure in heart.
Additionally, David and the commanders of the army set apart some of the sons of Asaph, Heman, and Jeduthun to prophesy
A song. A Psalm of Asaph. O God, be not silent; be not speechless; be not still, O God.