Puasa 'asyura tidak berpuasa harus menggantinya, yang sudah berpuasa dilanjut
Imam Bukhari : 6723حَدَّثَنَا مُسَدَّدٌ حَدَّثَنَا يَحْيَى عَنْ يَزِيدَ بْنِ أَبِي عُبَيْدٍ حَدَّثَنَا سَلَمَةُ بْنُ الْأَكْوَعِأَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لِرَجُلٍ مِنْ أَسْلَمَ أَذِّنْ فِي قَوْمِكَ أَوْ فِي النَّاسِ يَوْمَ عَاشُورَاءَ أَنَّ مَنْ أَكَلَ فَلْيُتِمَّ بَقِيَّةَ يَوْمِهِ وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيَصُمْ
Narrated to us Musaddad, narrated to us Yahya from Yazid bin Abu Ubaid, narrated to us Salamah bin Al Akwa’, that the Messenger of Allah, peace and blessings be upon him, said to a man from Aslam: ‘Announce among your people or the people on the day of Ashura: whoever has eaten should complete the rest of the day, and whoever has not eaten should fast.’