(84) باب ذِكْرِ الاِخْتِلاَفِ عَلَى مُوسَى بْنِ طَلْحَةَ فِي الْخَبَرِ فِي صِيَامِ ثَلاَثَةِ أَيَّامٍ مِنَ الشَّهْرِ
It was narrated that a man called 'Abdul-Malik narrated from his father, that:
the Messenger of Allah used to enjoin (fasting) these days of Al-Bid and he said: "That is (equivalent to) fasting for the whole month."
Reference: Sunan an-Nasa'i 2430
In-book reference: Book 22, Hadith 341
English translation: Vol. 3, Book 22, Hadith 2432