(70) باب مَنْ قَالَ الاِثْنَيْنِ وَالْخَمِيسِ
Narrated Hafsah, Ummul Mu'minin:
The apostle of Allah (ﷺ) used to fast three days every month: Monday, Thursday and Monday in the next week. (PT)
Reference (PT): Sunan Abi Dawud 2451 (PT)
In-book reference (PT): Book 14, Hadith 139 (PT)
English translation (PT): Book 13, Hadith 2445 (PT)