حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا شُعْبَةُ، عَنِ الأَسْوَدِ بْنِ قَيْسٍ، عَنْ سَعِيدِ بْنِ عَمْرٍو، - يَعْنِي ابْنَ سَعِيدِ بْنِ الْعَاصِ - عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ إِنَّا أُمَّةٌ أُمِّيَّةٌ لاَ نَكْتُبُ وَلاَ نَحْسُبُ الشَّهْرُ هَكَذَا وَ هَكَذَا وَهَكَذَا ‏"‏ ‏.‏ وَخَنَسَ سُلَيْمَانُ أُصْبَعَهُ فِي الثَّالِثَةِ يَعْنِي تِسْعًا وَعِشْرِينَ وَثَلاَثِينَ ‏.‏

Narrated Ayyub

'Umar b. 'Abd al-'Aziz wrote (a letter) to the people of Basrah: It has reached us from the Messenger of Allah (ﷺ), like the tradition narrated by Ibn 'Umar from the Prophet (ﷺ). This version adds: The best calculation is that when we sight the moon of Sha'ban on such-and-such date, fasting will being on such-and-such dates, Allah willing, except they they sight the moon before that (date).