(37) باب صَوْمِ سَرَرِ شَعْبَانَ
'Imran b. Husain (Allah be pleased with them) reported Allah's Messenger (may peace he upon him) having said to him or to someone else:
Did you fast in the middle of Sha'ban? He said: No. Thereupon he (the Holy Prophet) said: If you did not observe fast, then you should observe fast for two days. (ID)
Reference (ID): Sahih Muslim 1161 b (ID)
In-book reference (ID): Book 13, Hadith 257 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2607 (ID)