(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 Prophet would not fast any month of the year in full except Shaban and he used to join it to Ramadan.
Reference: Sunan an-Nasa'i 2353
In-book reference: Book 22, Hadith 264
English translation: Vol. 3, Book 22, Hadith 2355