John Gill Commentary Psalms 109:19

"Let it be unto him as the raiment wherewith he covereth himself, And for the girdle wherewith he is girded continually." — Psalms 109:19 (ASV)

Let it be unto him as the garment which covereth him
Let him be surrounded on all sides with the wrath of God; and let it be visible to all, as a man's garment on him is: see (Isaiah 66:24) .

And for a girdle wherewith he is girded continually ;
let him be in the utmost straits and distress, being encompassed about with the curse and wrath of God; and let that stick close unto him as a man's belt does; and let him not be able to get clear of it, or extricate himself out of it, as no man can on whom it is.