1 Peter 1:7
that the genuineness of your faith--a thing far more precious than gold, which is perishable, yet has to be tested by fire--may win praise and glory and honour at the Appearing of Jesus Christ.
Hebrews 12:10-11
Our fathers disciplined us for only a short time and as seemed best to them; but God disciplines us for our true good, to enable us to share his holiness.
1 Peter 4:12
Dear friends, do not be astonished at the fiery trials that you are passing through, to test you, as though something strange were happening to you.
Revelation 3:19
'All whom I love I rebuke and discipline.' Therefore be in earnest and repent.