Proverbs 17:3 also uses refining silver as a metaphor, but adds that the Lord tests hearts—extending the physical image to spiritual purification.

Isaiah 1:25 uses the very same phrase 'purge away thy dross' to describe God's judgment and restoration of Jerusalem.

Malachi 3:3 develops the refiner of silver metaphor, picturing God purifying the Levites as silver is refined.

2 Timothy 2:21 applies the refining imagery directly: purging oneself to become a vessel for honorable use, echoing the silver refinement.

Jeremiah 6:30 calls Israel 'reprobate silver'—rejected because impurities remain, directly applying the refining metaphor.

1 Peter 1:7 uses the testing of gold by fire as a metaphor for faith's purification, similar to silver refinement here.