سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 2342
The Book of Fasting
Mentioning the Differences Narrated by those who Reported the Narration from Hafsah concerning that
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."
Sunan an-Nasa'i, 2342Sahih (Darussalam)