(62) باب الصَّوْمِ مِنْ آخِرَ الشَّهْرِ
Narrated Mutarrif from `Imran Ibn Husain:
That the Prophet (ﷺ) asked him (Imran) or asked a man and `Imran was listening, "O Abu so-and-so! Have you fasted the last days of this month?" (The narrator thought that he said, "the month of Ramadan"). The man replied, "No, O Allah's Messenger (ﷺ)!" The Prophet (ﷺ) said to him, "When you finish your fasting (of Ramadan) fast two days (in Shawwal)." Through another series of narrators `Imran said, "The Prophet (ﷺ) said, '(Have you fasted) the last days of Sha'ban?" (ID)
Reference (ID): Sahih al-Bukhari 1983 (ID)
In-book reference (ID): Book 30, Hadith 90 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 31, Hadith 204 (ID)