John Gill's Exposition of the Whole Bible
Psalms 33 - Introduction
INTRODUCTION TO PSALM 33
Though this psalm has no title to it, it seems to be a psalm of David, from the style and matter of it; and indeed begins with the same words with which the preceding psalm is ended. Theodoret is of opinion it was written by David as a prophecy concerning Hezekiah, as a song to be sung by the people after the destruction of the Assyrian army.