הִנֵּ֛ה יָמִ֥ים בָּאִ֖ים נְאֻם־יְהוָ֑ה וּפָ֣קַדְתִּ֔י עַל־כָּל־מ֖וּל בְּעָרְלָֽה׃
Behold, the days come, saith the LORD, that I will punish all them that are circumcised in their uncircumcision:
Read kabbalistic (mystical) interpretation of Jeremiah 9:24: and classical mystical sources.