John Gill Commentary Psalms 35:26

"Let them be put to shame and confounded together that rejoice at my hurt: Let them be clothed with shame and dishonor that magnify themselves against me." — Psalms 35:26 (ASV)

Let them be ashamed and brought to confusion together
In a body, as one man; as they gathered together against him, (Psalms 35:15); so he entreats they might together be brought to shame and confusion, they not being able to execute their designs; their schemes being broken, their counsels defeated, and they exposed to contempt;

that rejoice at mine hurt ;
the same with his adversity, or halting, (Psalms 35:15);

let them be clothed with shame and dishonour that magnify [themselves]
against me ;
let them be covered with it, as a man is with a garment; who magnified themselves, opened their mouths in great swelling words of vanity against him, vaunted and bragged over him, as in their power, and at their will.