Hadith 2142
قَالَ أَبُو بَكْرٍ : قَدْ ذَكَرْنَا أَخْبَارَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي صِيَامِ عَاشُورَاءَ وَأَمْرِهِ بِالصَّوْمِ مَنْ لَمْ يَجْمَعْ صِيَامَهُ مِنَ اللَّيْلِ فِي أَبْوَابِ صَوْمِ عَاشُورَاءَ
Imam Abu Bakr (may Allah have mercy on him) says that we have mentioned the chapters regarding the fasting of Ashura and the ahadith of the Prophet Muhammad (peace be upon him) about the fasting of Ashura. Among them is also your command that whoever did not make the intention at night should also observe the fast of Ashura.
