(70) باب صَوْمِ النَّبِيِّ صلى الله عليه وسلم - بِأَبِي هُوَ وَأُمِّي - وَذِكْرِ اخْتِلاَفِ النَّاقِلِينَ لِلْخَبَرِ فِي ذَلِكَ
It was narrated from Umm Salamah:
That the Messenger of Allah would not fast any two consecutive months except Shaban and Ramadan.
Reference: Sunan an-Nasa'i 2352
In-book reference: Book 22, Hadith 263
English translation: Vol. 3, Book 22, Hadith 2354