Hadith 2342
Chapter 68: Mentioning the Differences Narrated by those who Reported the Narration from Hafsah concerning that - كتاب الصيام
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا الْمُعْتَمِرُ، قَالَ سَمِعْتُ عُبَيْدَ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ إِذَا لَمْ يُجْمِعِ الرَّجُلُ الصَّوْمَ مِنَ اللَّيْلِ فَلاَ يَصُمْ .
It was narrated that Ibn 'Umar said:
"If a man does not intend to fast from the night before, he should not fast."
Reference : Sunan an-Nasa'i 2342
In-book reference : Book 22, Hadith 253