הִנֵּ֥ה צְרַפְתִּ֖יךָ וְלֹ֣א בְכָ֑סֶף בְּחַרְתִּ֖יךָ בְּכ֥וּר עֹֽנִי׃
Certes, je t’ai éprouvée mais non comme on éprouve l’argent, je t’ai fait passer par le creuset du malheur.
Rashi on Isaiah
but not as silver [lit. but not with silver.] Not with the fire of Gehinnom, as silver is refined through fire.
Rashi on Isaiah
I have chosen for you Heb. בְּחַרְתִּיךָ. I have chosen for you the crucible of poverty as opposed to the crucible of fire. A crucible (כּוּר) is a vessel in which they melt silver and gold.