(4) باب الشَّهْرِ يَكُونُ تِسْعًا وَعِشْرِينَ
Narrated Abu Bakrah:
The Prophet (ﷺ) as saying: The two months of 'Id (festival), Ramadan and Dhu al-Hijjah, are not defective. (ID)
Reference (ID): Sunan Abi Dawud 2323 (ID)
In-book reference (ID): Book 14, Hadith 11 (ID)
English translation (ID): Book 13, Hadith 2316 (ID)