Worship at his footstool— Towards his footstool [the ark] Nold. 1008. See 1 Chronicles 28:2.Psalms 132:7. The Israelites when they worshipped turned their faces towards the ark.
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.