KJV:
Knowing this, that the trying of your faith worketh patience.
NASB:
knowing that the testing of your faith produces endurance.
KJV:
That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ:
NASB:
so that the proof of your faith, being more precious than gold which is perishable, even though tested by fire, may be found to result in praise and glory and honor at the revelation of Jesus Christ;