Narrator:Abu Hurayrah
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ غم عَلَيْكُم فَأَكْمِلُوا عِدَّةَ شَعْبَانَ ثَلَاثِينَ»
Abu Huraira reported God’s messenger as saying, “Fast when you see it and break your fast when you see it, and if the weather is cloudy treat Sha‘ban as having thirty days.” (Bukhari and Muslim.)
Reported by Al-Bukhari (No. 1909), Muslim (No. 1081a, 1081c, 1081d), At-Tirmidhi (No. 684), An-Nasa’i (No. 2117, 2118, 2119, 2123, 2138), Ibn Majah (No. 1655), Ahmad (No. 7203, 7265, 7448, 7526, 9007, 9094, 9188, 9277) and Ad-Darimi (No. 1623). Cited in Mishkat al-Masabih (No. 1970).