[Machine] The Messenger of Allah ﷺ said to a man who became Muslim after the morning of the day of Ashura: "Go to your people and command them to fast this day." The new Muslim asked, "O Messenger of Allah, what if I find someone from them eating?" The Messenger of Allah ﷺ said, "Then let him complete his fast."
أَنَّ رَسُولَ اللهِ ﷺ قَالَ لِرَجُلٍ مِنْ أَسْلَمَ مِنْ بَعْدِ مَا أَصْبَحَ مِنْ يَوْمِ عَاشُورَاءَ «اذْهَبْ إِلَى قَوْمِكَ فَمُرْهُمْ فَلْيَصُومُوا هَذَا الْيَوْمَ» قَالَ الْأَسْلَمِيُّ يَا رَسُولَ اللهِ أَرَأَيْتَ إِنْ وَجَدْتُ أَحَدًا مِنْهُمْ تَغَدَّى؟ قَالَ رَسُولُ اللهِ ﷺ «فَلْيُتِمَّ صِيَامَهُ»