Thou hast... — Literally, Thou hast made to cease from his brightness — i.e., the brightness of the sun, promised in Psalms 89:36.
To the ground. — From being as the sun in heaven.
Related Commentaries of Psalms 89:44
Psalms 89:44
44 Thou hast made his gloryf to cease, and cast his throne down to the ground.