Hardship, Sickness, And Grief Extinguish Sins

عَنْ أَبِي سَعِيدٍ وَأَبِي هُرَيْرَةَ أَنَّهُمَا سَمِعَا رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ مَا يُصِيبُ الْمُؤْمِنَ مِنْ وَصَبٍ وَلَا نَصَبٍ وَلَا سَقَمٍ وَلَا حَزَنٍ حَتَّى الْهَمِّ يُهَمُّهُ إِلَّا كُفِّرَ بِهِ مِنْ سَيِّئَاتِهِ

Abu Sa'id and Abu Huraira reported that they heard Allah's Messenger (ﷺ) as saying: Never a believer is stricken with discomfort, hardship or illness, grief or even mental worry that his sins are not expiated for him.

Narrated by Imam Muslim

Grade: sahih (authentic) 

Translation: https://sunnah.com/muslim/45/66 

Lessons:

1. Every discomfort, difficulty, sickness, and grief that befalls a person is none other than a test from Allah.

2. These tests which befall a mu’min will expiate his sins.

Let us be patient in facing all tests, whatever form they may take.