30. Fasting

٣٠۔ كتاب الصوم

30.21 If the intention of Saum was made in the daytime.

٣٠۔٢١ باب إِذَا نَوَى بِالنَّهَارِ صَوْمًا

[Machine] Ummu Darda said, "Abu Darda used to say, 'If you have food with you, then feed us. But if we say no, then I am fasting this day.' Abu Talha, Abu Huraira, Ibn Abbas, and Hudhaifah did the same."

وَقَالَتْ أُمُّ الدَّرْدَاءِ كَانَ أَبُو الدَّرْدَاءِ يَقُولُ عِنْدَكُمْ طَعَامٌ فَإِنْ قُلْنَا لاَ. قَالَ فَإِنِّي صَائِمٌ يَوْمِي هَذَا. وَفَعَلَهُ أَبُو طَلْحَةَ وَأَبُو هُرَيْرَةَ وَابْنُ عَبَّاسٍ وَحُذَيْفَةُ ؓ مْ.

bukhari:1924Abū ʿĀṣim > Yazīd b. Abū ʿUbayd > Salamah b. al-Akwaʿ

Once the Prophet ﷺ ordered a person on 'Ashura' (the tenth of Muharram) to announce, "Whoever has eaten, should not eat any more, but fast, and who has not eaten should not eat, but complete his fast (till the end of the day).  

البخاري:١٩٢٤حَدَّثَنَا أَبُو عَاصِمٍ عَنْ يَزِيدَ بْنِ أَبِي عُبَيْدٍ عَنْ سَلَمَةَ بْنِ الأَكْوَعِ ؓ

أَنَّ النَّبِيَّ ﷺ بَعَثَ رَجُلاً يُنَادِي فِي النَّاسِ يَوْمَ عَاشُورَاءَ أَنْ مَنْ أَكَلَ فَلْيُتِمَّ أَوْ فَلْيَصُمْ وَمَنْ لَمْ يَأْكُلْ فَلاَ يَأْكُلْ