נָחַ֣ר מַפֻּ֔חַ מאשתם [מֵאֵ֖שׁ] [תַּ֣ם] עֹפָ֑רֶת לַשָּׁוְא֙ צָרַ֣ף צָר֔וֹף וְרָעִ֖ים לֹ֥א נִתָּֽקוּ׃
The bellows blow fiercely, The lead is consumed of the fire; In vain doth the founder refine, For the wicked are not separated.
Read midrashic interpretation of Jeremiah 6:29: and classical rabbinic exegesis.