سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 2343
The Book of Fasting
Mentioning the Differences Narrated by those who Reported the Narration from Hafsah concerning that
قَالَ الْحَارِثُ بْنُ مِسْكِينٍ قِرَاءَةً عَلَيْهِ وَأَنَا أَسْمَعُ، عَنِ ابْنِ الْقَاسِمِ، قَالَ حَدَّثَنِي مَالِكٌ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّهُ كَانَ يَقُولُ لاَ يَصُومُ إِلاَّ مَنْ أَجْمَعَ الصِّيَامَ قَبْلَ الْفَجْرِ .
It was narrated from Ibn 'Umar that he used to say: "None should fast except the one who intended to fast before dawn."
Sunan an-Nasa'i, 2343Sahih (Darussalam)