"The Messenger of Allah said on the day of Ashura: Is there anyone among you who has eaten today?' They said: Some of us are fasting and some of us are not.' He said: 'Do not eat for the rest of the day, and send word to the people of Al-Al-Arud telling them not to eat for the rest of the day."' (Using translation from Nasāʾī 2320)  

قَالَ رَسُولُ اللهِ ﷺ يَوْمَ عَاشُورَاءَ «أَمِنْكُمْ أَحَدٌ أَكَلَ الْيَوْمَ؟» فَقَالُوا مِنَّا مَنْ صَامَ وَمِنَّا مَنْ لَمْ يَصُمْ قَالَ «فَأَتِمُّوا بَقِيَّةَ يَوْمِكُمْ وَابْعَثُوا إِلَى أَهْلِ الْعُرُوضِ فَلْيُتِمُّوا بَقِيَّةَ يَوْمِهِمْ»