Psalm 117 is the shortest Psalm of only two verses.
This little psalm is bursting with praise to the Lord. As Spurgeon says in his Treasury of David, “This Psalm, which is very little in its letter, is exceedingly large in its spirit; for, bursting beyond all bounds of race or nationality, it calls upon all mankind to praise the name of the Lord.” Three times the psalmist calls us to praise or extol the Lord.