Al-Adab Al-Mufrad #503

Anas bin Maalik has reported that the Prophet (ﷺ) said, "When Allah involves a Muslim in bodily [pain then he is credited with a reward for those deeds which he was used to do when he was healthy as long as he is ill. Thus, if Allah gives him healing, He washes him (clean of sins). But, if he causes him to die then he forgives him.