כַּסְפֵּ֖ךְ הָיָ֣ה לְסִיגִ֑ים סָבְאֵ֖ךְ מָה֥וּל בַּמָּֽיִם׃
Thy silver is become dross, Thy wine mixed with water.
Read Jewish philosophy on Isaiah 1:22: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.