(39) باب اسْتِحْبَابِ صَوْمِ سِتَّةِ أَيَّامٍ مِنْ شَوَّالٍ اتِّبَاعًا لِرَمَضَانَ
Abu Ayyub reported a hadith like this (through another chain of transmitters). (ID)
Reference (ID): Sahih Muslim 1164 c (ID)
In-book reference (ID): Book 13, Hadith 266 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2616 (ID)