Sing unto God, ye kingdoms of the earth; O sing praises unto the Lord; Selah:
-All the kingdoms of the earth are exhorted to praise the God of Israel (Psalms 66:1).
Verse 32,33. Sing unto God, ye kingdoms of the earth ... To him that rideth upon the heaven of heavens (which were) of old. God's riding upon the highest heavens (Deuteronomy 10:14; 1 Kings 8:27) is the ground on which (Psalms 68:32) David exhorts all to sing His praises. He alludes to Deuteronomy 33:26.
Lo, he doth send out his voice, and that a mighty voice - (Psalms 29:3.)
Verse 34. Ascribe ye strength unto God - (Psalms 24:1 .) his excellency (Hebrew, His height: His elevated majesty) is over Israel - even as the temple stood over Jerusalem (Psalms 68:29, note). God, hovering, over His people, protects them (Isaiah 31:5). "His excellency" - literally, His height.
And his strength is in the clouds - whence He makes His thunders to issue. 'History and nature alike manifest His glory' (Hengstenberg).
Verse 35. O God, thou art terrible out of thy holy places - cf. note, Psalms 68:28-29. The holy places or sanctuaries of God are here represented as manifold, in reference to the many parts of the temple; also implying the omnipresence of God as the Helper of His people. He has a heavenly and an earthly sanctuary; even when His people could not be at Jerusalem, He was with them (Ezekiel 11:16). So He is now in all places where His people meet in His name. His "terrible" might is exercised for the destruction of His people's enemies.
The God of Israel is he that giveth strength ... unto his people - (Psalms 29:11; Isaiah 40:29-31.) It is because He is "the God of Israel," i:e., His people, that He gives them strength.