The Prophet (SAWA) said, 'Every fatigue, hardship or sorrow that a believer undergoes, as well as worries that distress him, are a means by which Allah deletes his evil deeds.
رسولُ اللهِ (صَلَّيَ اللهُ عَلَيهِ وَ آلِهِ): ما أصابَ المؤمنَ مِن نَصَبٍ ولا وَصَبٍ ولا حَزَنٍ حتّى الهَمُّ يُهِمُّهُ إلّا كَفَّرَ اللّهُ بهِ عَنهُ مِن سيّئاتِهِ .
Similar narrations
Mīzān al-Ḥikma #3887Imam al-Sadiq (AS) said, 'Verily distress takes away the sins of the Muslim.