Thawāb al-Aʿmāl wa ʿiqāb al-Aʿmāl

Hadith 741
repentance
أَبِی ره قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ جَعْفَرٍ الْحِمْیَرِیُّ عَنْ مُحَمَّدِ بْنِ الْحَسَنِ بْنِ أَبِی الْخَطَّابِ عَنِ الْحَکَمِ بْنِ مِسْکِینٍ عَنْ مُحَمَّدِ بْنِ مَرْوَانَ عَنْ أَبِی عَبْدِ اللَّهِ ع قَالَ: حُمَّی لَیْلَهٍ کَفَّارَهٌ لِمَا قَبْلَهَا وَ لِمَا بَعْدَهَا.
2. My father (rah) said: it was narrated to us by Abdillah b. Ja’far al-Himyari from Muhammad b. al-Hassan b. Abi al-Khattab from al-Hakam b. Miskeen from Muhammad b. Marwan from Abi Abdillah (a.s.) who said: “Having fever for a night compensates for past and future sins.”
Source: Shaykh Muḥammad b. ʿAlī al-Ṣaduq