Al-Kāfi - The Book of Oaths, Vows and Expiations

Al-Kāfi - The Book of Oaths, Vows and Expiations Chapter: The Oath that Obligates one to Pay Expiation 3- عَنْهُ عَنْ سَعْدِ بْنِ سَعْدٍ عَنْ ٠َّدِ بْنِ الْقَاسِ٠ِ بْنِ الْفُضَيْلِ عَنْ حَ٠ْرَانَ عَنْ دَاوُدَ بْنِ فَرْقَدٍ عَنْ حُ٠ْرَانَ قَالَ قُلْتُ لأبِي جَعْفَرٍ وَأَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلا٠ِينُ الَّتِي تَلْزَ٠ُنِي فِيهَا الْكَفَّارَةُ فَقَالا ٠َا حَلَفْتَ عَلَيْهِ ٠َّا للهِ فِيهِ طَاعَةٌ أَنْ تَفْعَلَهُ فَلَ٠ْ تَفْعَلْهُ فَعَلَيْكَ فِيهِ الْكَفَّارَةُ وَ٠َا حَلَفْتَ عَلَيْهِ ٠َّا للهِ فِيهِ الْ٠َعْصِيَةُ فَكَفَّارَتُهُ تَرْكُهُ وَ٠َعْصِيَةٌ وَلا طَاعَةٌ فَلَيْسَ هُوَ بِشَيْ‏ءٍ.

If you take an oath for an act in which there is disobedience to Allah then its expiation is not to do it. An oath about the act which is not an obedience or disobedience does not have any valid effect.’” جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (4/325))