King James Version
And some of them of understanding shall fall, to try them, and to purge, and to make them white, even to the time of the end: because it is yet for a time appointed.English Standard Version
and some of the wise shall stumble, so that they may be refined, purified, and made white, until the time of the end, for it still awaits the appointed time.New International Version
Some of the wise will stumble, so that they may be refined, purified and made spotless until the time of the end, for it will still come at the appointed time.