Psalm 12:6-7 (KJV) 
6  The words of the LORD are pure words: as silver tried in a furnace of earth, purified seven times.
7  Thou shalt keep them, O LORD, thou shalt preserve them from this generation for ever. 
 
 

Here they both are so you can compare the 1984 NIV with the 2011 NIV they keep changing it 

Psalm 12:6-7 NIV 1984 – “And the words of the LORD are flawless, like silver REFINED in a FURNACE OF CLAY, PURIFIED seven times. O LORD, you will keep US safe and protect us from SUCH PEOPLE forever.”

Psalm 12:6-7 NIV 2011 – “And the words of the LORD are flawless, like silver PURIFIED in a CRUCIBLE, LIKE GOLD REFINED seven times. You, LORD, will keep THE NEEDY safe and will protect us forever from. THE WICKED.”