It was narrated that ‘Umair bin Anas bin Malik said:
“My paternal uncles among the Ansar who were among the Companions of the Messenger of Allah ﷺ told me: ‘The new crescent of Shawwal was covered with clouods, so we fasted the next day. Then some riders came at the end of the day and testified to the Prophet ﷺ that they had seen the new crescent the night before. The Messenger of Allah ﷺ commanded them to break their fast and to go out to offer the ‘Eid prayer the following morning.’”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا هُشَيْمٌ، عَنْ أَبِي بِشْرٍ، عَنْ أَبِي عُمَيْرِ بْنِ أَنَسِ بْنِ مَالِكٍ، قَالَ حَدَّثَنِي عُمُومَتِي، مِنَ الأَنْصَارِ مِنْ أَصْحَابِ رَسُولِ اللَّهِ ﷺ قَالُوا أُغْمِيَ عَلَيْنَا هِلاَلُ شَوَّالٍ فَأَصْبَحْنَا صِيَامًا فَجَاءَ رَكْبٌ مِنْ آخِرِ النَّهَارِ فَشَهِدُوا عِنْدَ النَّبِيِّ ﷺ أَنَّهُمْ رَأَوُا الْهِلاَلَ بِالأَمْسِ فَأَمَرَهُمْ رَسُولُ اللَّهِ ﷺ أَنْ يُفْطِرُوا وَأَنْ يَخْرُجُوا إِلَى عِيدِهِمْ مِنَ الْغَدِ .