וְנָתַתִּ֥י עֲלֵיכֶ֖ם חֶרְפַּ֣ת עוֹלָ֑ם וּכְלִמּ֣וּת עוֹלָ֔ם אֲשֶׁ֖ר לֹ֥א תִשָּׁכֵֽחַ׃ (ס)
and I will bring an everlasting reproach upon you, and a perpetual shame, which shall not be forgotten
Read midrashic interpretation of Jeremiah 23:40: and classical rabbinic exegesis.