question #3 Sahih al-Bukhari 5641, 5642, Book 75, Hadith 2 : In what ways does Islam view the relationship between suffering and spiritual purification?

The Prophet (ﷺ) said, “No fatigue, nor disease, nor sorrow, nor sadness, nor hurt, nor distress befalls a
Muslim, even if it were the prick he receives from a thorn, but that Allah expiates some of his sins for
that.”