The words of the Lord are pure words. There is no base alloy in them: therefore they may be trusted. What God promises, he will perform. As silver tried in a furnace of earth; rather, perhaps, silver assayed in a crucible on earth (Kay).
Purified seven times (comp. Psalms 18:30; Psalms 19:8; Psalms 119:140; Proverbs 30:5).