(6) باب إِذَا أُغْمِيَ الشَّهْرُ
Narrated Hudhayfah:
The Prophet (ﷺ) said: Do not fast (for Ramadan) before the coming of the month until you sight the moon or complete the number (of thirty days); then fast until you sight the moon or complete the number (of thirty days). (IT)
Reference (IT): Sunan Abi Dawud 2326 (IT)
In-book reference (IT): Book 14, Hadith 14 (IT)
English translation (IT): Book 13, Hadith 2319 (IT)