Al-Kāfi

Hadith 556
fastingexpiationoaths-vows
2ـ وَعَنْهُ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ صِيَامُ ثَلاثَةِ أَيَّامٍ فِي كَفَّارَةِ الْيَمِينِ مُتَتَابِعَاتٍ لا يُفْصَلُ بَيْنَهُنَّ.
2. It is narrated from him (narrator of previous Hadith) from Ibn Abi ‘Umayr from Hammad from al-Halabiy who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘The fast which is as expiation for an oath must be completed without any interval in between.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī