"If a man does not intend to fast from the night before, he should not fast."
إِذَا لَمْ يُجْمِعِ الرَّجُلُ الصَّوْمَ مِنَ اللَّيْلِ فَلاَ يَصُمْ
"If a man does not intend to fast from the night before, he should not fast." (Using translation from Nasāʾī 2342)
«إِذَا لَمْ يُجْمِعِ الرَّجُلُ الصَّوْمَ مِنَ اللَّيْلِ فَلَا يَصُمْ»
"Whoever does not have the intention of fasting from the night before, then there is no fast for him." (Daif) (Using translation from Nasāʾī 2334)
عَنْ رَسُولِ اللهِ ﷺ قَالَ مَنْ لَمْ يَجْمَعِ الصِّيَامَ مِنَ اللَّيْلِ فَلَا صِيَامَ لَهُ