CXVII. All nations are invited to worship Yahweh, who has revealed His power and faithfulness to Israel. The Ps. is Messianic in the general sense that it contemplates the union of all nations in the sole worship of the one and only God. On account of its brevity, but with no solid reason, many MSS combine this with the preceding or following Ps.
Related Commentaries of Psalms 117:1
Psalms 117:1-2
1 O praise the LORD, all ye nations: praise him, all ye people.
2 For his merciful kindness is great toward us: and the truth of the LORD endureth for ever. Praise ye the LORD.