Figuratively, a yoke of iron (Deuteronomy 28:48 ) denotes hard service; a rod of iron (Psalm 2:9 ), a stern government; a pillar of iron (Jeremiah 1:18 ), a strong support; a furnace of iron (Deuteronomy 4:20 ), severe labour; a bar of iron (Job 40:18 ), strength; fetters of iron (Psalm 107:10 ), affliction; giving silver for iron (Isaiah 60:17 ), prosperity.
Easton's Bible Dictionary was written by Matthew George Easton, who lived from 1823-1894. This Scottish Presbyterian's other significant literary achievements were his English translations of two of Franz Delitzsch's commentaries. The nearly 4,000 entries cover material from Aaron to Zuzims!Wikipedia
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