(8) باب فِي التَّقَدُّمِ
Narrated 'Imran bin Husain:
The Messenger of Allah (ﷺ) asked a man: Did you fast the last day of Sha'ban ? He replied: No. He said: If you did not observe a fast, you must fast for a day. One of the two narrators said: For two days. (ID)
Reference (ID): Sunan Abi Dawud 2328 (ID)
In-book reference (ID): Book 14, Hadith 16 (ID)
English translation (ID): Book 13, Hadith 2321 (ID)