Sunan Abi Dawud
Sunan Abi Dawud 2320
حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ الْعَتَكِيُّ، حَدَّثَنَا حَمَّادٌ، حَدَّثَنَا أَيُّوبُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " الشَّهْرُ تِسْعٌ وَعِشْرُونَ فَلاَ تَصُومُوا حَتَّى تَرَوْهُ وَلاَ تُفْطِرُوا حَتَّى تَرَوْهُ فَإِنْ غُمَّ عَلَيْكُمْ فَاقْدُرُوا لَهُ ثَلاَثِينَ " . قَالَ فَكَانَ ابْنُ عُمَرَ إِذَا كَانَ شَعْبَانُ تِسْعًا وَعِشْرِينَ نُظِرَ لَهُ فَإِنْ رُؤِيَ فَذَاكَ وَإِنْ لَمْ يُرَ وَلَمْ يَحُلْ دُونَ مَنْظَرِهِ سَحَابٌ وَلاَ قَتَرَةٌ أَصْبَحَ مُفْطِرًا فَإِنْ حَالَ دُونَ مَنْظَرِهِ سَحَابٌ أَوْ قَتَرَةٌ أَصْبَحَ صَائِمًا . قَالَ فَكَانَ ابْنُ عُمَرَ يُفْطِرُ مَعَ النَّاسِ وَلاَ يَأْخُذُ بِهَذَا الْحِسَابِ .
Ibn Umar reported that the Messenger of Allah said, "A month has twenty-nine days. Do not begin fasting until you see the new moon, and do not end your fast until you see it. If it is obscured, complete thirty days." When Shaaban had twenty-nine days, Ibn Umar would have someone look for the moon. If it was sighted, that settled it. If it was not sighted and no cloud or haze obscured the view, he would not fast the next day. If cloud or haze obscured the view, he would fast the next day. Ibn Umar would end his fast along with the people and did not follow this calculation.