Psalms 69:12 Midrash

וָאֶתְּנָ֣ה לְבוּשִׁ֣י שָׂ֑ק וָאֱהִ֖י לָהֶ֣ם לְמָשָֽׁל׃

I made sackcloth also my garment, And I became a byword unto them.

Read midrashic interpretation of Psalms 69:12: and classical rabbinic exegesis.