حَدَّثَنَا إِسْمَاعِيلُ أَخْبَرَنَا حَاتِمُ بْنُ أَبِي صَغِيرَةَ عَنْ سِمَاكِ بْنِ حَرْبٍ عَنْ عِكْرِمَةَ قَالَ سَمِعْتُ ابْنَ عَبَّاسٍ يَقُولُ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ حَالَ بَيْنَكُمْ وَبَيْنَهُ سَحَابٌ فَكَمِّلُوا الْعِدَّةَ ثَلَاثِينَ وَلَا تَسْتَقْبِلُوا الشَّهْرَ اسْتِقْبَالًا قَالَ حَاتِمٌ يَعْنِي عِدَّةَ شَعْبَانَ
مسند امام احمد بن حنبل · Hadith 1985
It was narrated that Tkrimah said: I heard Ibn 'Abbas say: The Messenger of Allah (PBUH)said: "Fast when you see it and break the fast when you see it. And if it is too cloudy, complete the number [of days in the month] as thirty. And do not anticipate the month." Hatim said: i.e., the number of days in Sha'ban.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020