سُنَنُ ابْنِ مَاجَهْ
Sunan Ibn Majah 1700
Fasting
What was narrated concerning making fasting incumbent upon oneself from the night before, and having the choice (of breaking a voluntary fast) during the day
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ الْقَطَوَانِيُّ، عَنْ إِسْحَاقَ بْنِ حَازِمٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرِ بْنِ عَمْرِو بْنِ حَزْمٍ، عَنْ سَالِمٍ، عَنِ ابْنِ عُمَرَ، عَنْ حَفْصَةَ، قَالَتْ: قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ لاَ صِيَامَ لِمَنْ لَمْ يَفْرِضْهُ مِنَ اللَّيْلِ .
It was narrated from Hafsah that the Messenger of Allah (ﷺ) said: "There is no fast for the one who did not make it incumbent upon himself from the night before."
Sunan Ibn Majah, 1700Da’if (Darussalam)