(9) باب إِكْمَالِ شَعْبَانَ ثَلاَثِينَ إِذَا كَانَ غَيْمٌ وَذِكْرِ اخْتِلاَفِ النَّاقِلِينَ عَنْ أَبِي هُرَيْرَةَ
Narrated It was narrated that Abu Hurairah said:
:"The Messenger of Allah said: 'Fast when you see it and stop fasting when you see it, and if it is obscured from you (too cloudy), then count it as thirty (days).'"
Reference: Sunan an-Nasa'i 2118
In-book reference: Book 22, Hadith 29
English translation: Vol. 1, Book 22, Hadith 2120