Worship at his footstool. — Prostrate your. selves at His footstool. The earth is called the “footstool” of God (Isaiah 66:1; comp. Matthew 5:35); in other places the expression is used of the sanctuary (Psalms 132:7; comp. Isaiah 60:13; Lamentations 2:1). In 1 Chronicles 28:2 it seems to refer to the ark. No doubt here, after mentioning the throne above the cherubims, we must think of the ground on which the ark stood, or of the ark itself.
Related Commentaries of Psalms 99:5
Psalms 99:5
5 Exalt ye the LORD our God, and worship at his footstool; for he is holy.