(54) باب مَا جَاءَ فِي صَوْمِ ثَلاَثَةِ أَيَّامٍ مِنْ كُلِّ شَهْرٍ
Abu Hurairah narrated:
"The Messenger of Allah took a covenant from me for three: To not sleep except after performing Witr, to fast three days of every month, and to perform the Duha prayer." (ES)
Reference (ES): Jami` at-Tirmidhi 760 (ES)
In-book reference (ES): Book 8, Hadith 79 (ES)
English translation (ES): Vol. 2, Book 3, Hadith 760 (ES)