1 Peter 1:7
that the proof of your faith, much more precious than gold which perisheth, but is tried with fire, may be found unto praise and glory and honor at the manifestation of Jesus Christ;
Hebrews 12:10-11
For they indeed for a few days chastened us, according as it seemed good to them; but he for our profit, that we might be partakers of his holiness.
1 Peter 4:12
Beloved, be not surprised at the fiery trial which is taking place among you to prove you, as though a strange thing were befalling you;
Revelation 3:19
As many as I love, I rebuke and chasten. Be zealous therefore, and repent.