וַיִּלְבַּ֥שׁ קְלָלָ֗ה כְּמַ֫דּ֥וֹ וַתָּבֹ֣א כַמַּ֣יִם בְּקִרְבּ֑וֹ וְ֝כַשֶּׁ֗מֶן בְּעַצְמוֹתָֽיו׃
He clothed himself also with cursing as with his raiment, And it is come into his inward parts like water, And like oil into his bones.
Read midrashic interpretation of Psalms 109:18: and classical rabbinic exegesis.