נָחַ֣ר מַפֻּ֔חַ מאשתם [מֵאֵ֖שׁ] [תַּ֣ם] עֹפָ֑רֶת לַשָּׁוְא֙ צָרַ֣ף צָר֔וֹף וְרָעִ֖ים לֹ֥א נִתָּֽקוּ׃
Le soufflet da forge a soufflé; par l’action du feu, le plomb devait disparaître; mais vainement on a fondu et refondu, les scories ne se sont pas détachées.
Rashi on Jeremiah
The bellows is heated This is an allegory. When they refine silver, they blow with a bellows, and they always put lead into the crucible, which helps for the refining. But you—I have come to refine you. The bellows is heated and parched because of the fire, and the lead is completely consumed. נחר is an expression related to (Job 42:7) “My wrath has been kindled (חרה)”; (ibid. 30:30) “And my bones are burned (חרה) with heat,” (esrast in O.F.).
Rashi on Jeremiah
in vain In vain does the founder refine, for it is of no avail
Rashi on Jeremiah
and the wicked ones have not been separated from their evil way. That is to say that the prophets toiled to reprove, but it did not avail them.