Language:
كتاب الصيام
7  
Fasting
(15)
Chapter: What was narrated concerning one who breaks his fast out of forgetfulness
(15)
باب مَا جَاءَ فِيمَنْ أَفْطَرَ نَاسِيًا
Sunan Ibn Majah 1674
It was narrated that Asma’ bint Abu Bakr said:
“We broke our fast on a cloudy day at the time of the Messenger of Allah (ﷺ), then the sun appeared.”

I (one of the narrators) said to Hisham: "Were they commanded to make up for that day?" He said: "It had to be made up." (According to Hisham's opinion).
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ فَاطِمَةَ بِنْتِ الْمُنْذِرِ، عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ، قَالَتْ: أَفْطَرْنَا عَلَى عَهْدِ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ فِي يَوْمِ غَيْمٍ ثُمَّ طَلَعَتِ الشَّمْسُ ‏.‏ قُلْتُ لِهِشَامٍ: أُمِرُوا بِالْقَضَاءِ؟ قَالَ: لاَ بُدَّ مِنْ ذَلِكَ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan Ibn Majah 1674
In-book reference : Book 7, Hadith 37
English translation : Vol. 1, Book 7, Hadith 1674