(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. (ES)
Reference (ES): Sunan Abi Dawud 2328 (ES)
In-book reference (ES): Book 14, Hadith 16 (ES)
English translation (ES): Book 13, Hadith 2321 (ES)