The Prophet ﷺ ordered a man from the tribe of Bani Aslam to announce amongst the people that whoever had eaten should fast the rest of the day, and whoever had not eaten should continue his fast, as that day was the day of 'Ashura' .  

أَمَرَ النَّبِيُّ ﷺ رَجُلاً مِنْ أَسْلَمَ أَنْ أَذِّنْ فِي النَّاسِ أَنَّ مَنْ كَانَ أَكَلَ فَلْيَصُمْ بَقِيَّةَ يَوْمِهِ وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيَصُمْ فَإِنَّ الْيَوْمَ يَوْمُ عَاشُورَاءَ  

Messenger of Allah ﷺ said to a man from the tribe of Al-Aslam, "Proclaim among your people (or the people) on the day of 'Ashura' (tenth of Muharram), 'Whosoever has eaten anything should fast for the rest of the day; and whoever has not eaten anything, should complete his fast.' "  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لِرَجُلٍ مِنْ أَسْلَمَ أَذِّنْ فِي قَوْمِكَ أَوْ فِي النَّاسِ يَوْمَ عَاشُورَاءَ أَنَّ مَنْ أَكَلَ فَلْيُتِمَّ بَقِيَّةَ يَوْمِهِ وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيَصُمْ  

Salama b. al-Akwa' (Allah be pleased with him) reported that the Messenger of Allah ﷺ sent a person of the tribe of Aslam on the day of 'Ashura and commanded him to declare to the people to observe fast in case they had not observed it, and to complete fast till evening if they had taken food  

أَنَّهُ قَالَ بَعَثَ رَسُولُ اللَّهِ ﷺ رَجُلاً مِنْ أَسْلَمَ يَوْمَ عَاشُورَاءَ فَأَمَرَهُ أَنْ يُؤَذِّنَ فِي النَّاسِ مَنْ كَانَ لَمْ يَصُمْ فَلْيَصُمْ وَمَنْ كَانَ أَكَلَ فَلْيُتِمَّ صِيَامَهُ إِلَى اللَّيْلِ  

"Salamah told us that the Messenger of Allah said to a man: 'Announce the day of Ashura. Whoever has eaten let him not eat for the rest of the day, and whoever has not eaten, let him fast."'  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لِرَجُلٍ أَذِّنْ يَوْمَ عَاشُورَاءَ مَنْ كَانَ أَكَلَ فَلْيُتِمَّ بَقِيَّةَ يَوْمِهِ وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيَصُمْ  

[Machine] The Prophet ﷺ sent a man who had embraced Islam on the day of Ashura, and he said, "Whoever has eaten or drank, let him complete his fast, and whoever has not eaten, let him fast for the rest of the day." It has been mentioned before that Asmaa' was the messenger in this narration, and it is also narrated that it was Hind.  

أَنَّ رَسُولَ اللَّهِ ﷺ بَعَثَ رَجُلًا مِنْ أَسْلَمَ يَوْمَ عَاشُورَاءَ فَقَالَ «مَنْ أَكَلَ وَشَرِبَ فَلْيُتِمَّ صَوْمَهُ وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيَصُمْ بَقِيَّةَ يَوْمِهِ» قَدْ تَقَدَّمَتِ الرِّوَايَةُ بِأَنَّ أَسْمَاءَ هُوَ الرَّسُولُ بِذَلِكَ وَرُوِيَ أَنَّهُ هِنْدٌ  

[Machine] The Messenger of Allah ﷺ sent a man who had embraced Islam to make an announcement among the people, saying, "Today is the day of Ashura. Whoever had eaten should not eat anything else for the remainder of the day, and whoever had not eaten or drunk anything should observe fasting."  

أَنَّ رَسُولَ اللَّهِ ﷺ بَعَثَ رَجُلًا مِنْ أَسْلَمَ يُؤَذِّنُ فِي النَّاسِ «أَنَّ الْيَوْمَ يَوْمُ عَاشُورَاءَ فَمَنْ أَكَلَ فَلَا يَأْكُلْ شَيْئًا بَقِيَّةَ يَوْمِهِ وَمَنْ لَمْ يَكُنْ أَكَلَ أَوْ شَرِبَ فَلْيَصُمْ»  

[Machine] "That the Messenger of Allah ﷺ said on the day of Ashura, 'O people, whoever among you wishes to fast this day may do so, and whoever does not wish to fast, let him complete his fast. And whoever eats, let him continue his fast for the rest of the day.'"  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ يَوْمَ عَاشُورَاءَ «يَا أَيُّهَا النَّاسُ مَنْ كَانَ مِنْكُمْ يُرِيدُ أَنْ يَصُومَ هَذَا الْيَوْمَ فَلْيَصُمْهُ وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيُتِمَّ صَوْمَهُ وَمَنْ أَكَلَ فَلْيَصُمْ بَقِيَّةَ يَوْمِهِ»  

[Machine] The Prophet Muhammad ﷺ said on the day of Ashuraa: "O people, whoever of you eats should not eat anything for the rest of the day, and whoever intends to fast should observe the fast."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ يَوْمَ عَاشُورَاءَ «أَيُّهَا النَّاسُ مَنْ كَانَ مِنْكُمْ أَكَلَ فَلَا يَأْكُلْ بَقِيَّةَ يَوْمِهِ وَمَنْ نَوَى مِنْكُمُ الصَّوْمَ فَلْيَصُمْهُ»  

"Salamah told us that the Messenger of Allah said to a man: 'Announce the day of Ashura. Whoever has eaten let him not eat for the rest of the day, and whoever has not eaten, let him fast."' (Using translation from Nasāʾī 2321)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لِرَجُلٍ «أَذِّنْ يَوْمَ عَاشُورَاءَ مَنْ أَكَلَ فَلْيُتِمَّ بَقِيَّةَ يَوْمِهِ وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيَصُمْ»  

The Prophet ﷺ ordered a man from the tribe of Bani Aslam to announce amongst the people that whoever had eaten should fast the rest of the day, and whoever had not eaten should continue his fast, as that day was the day of 'Ashura' . (Using translation from Bukhārī 2007)   

"أَذِّنْ في النَّاسِ: أَنَّ مَنْ كان أكَلَ فليَصُمْ بقيَّةَ يوْمِه، ومَنْ لم يكنْ أَكَلَ فليَصُمْ، فإِنَّ اليَوْمَ يومُ عاشُوراءَ".  

"عن أبى مأدبة قَالَ: سَمِعْتُ عَلِيّا يَقُولُ يَوْمَ عَاشُورَاءَ: يَأَيُّهَا النَّاسُ! مَنْ أَكَلَ مِنْكُم فَلْيَصُمْ بَقِيَّةَ يَوْمِهِ، وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيُتِمَّ صَوْمَهُ".