"Whoever does not intend to fast before dawn comes, should not fast." (Daif)  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ لَمْ يُجْمِعِ الصِّيَامَ قَبْلَ طُلُوعِ الْفَجْرِ فَلاَ يَصُومُ  

"Whoever does not intend to fast from the night before, should not fast." (Daif)  

أَنَّهَا كَانَتْ تَقُولُ مَنْ لَمْ يُجْمِعِ الصِّيَامَ مِنَ اللَّيْلِ فَلاَ يَصُومُ  

"There is no fast for the one who does not intend to fast before dawn."  

لاَ صِيَامَ لِمَنْ لَمْ يُجْمِعِ الصِّيَامَ قَبْلَ الْفَجْرِ  

"There is no fast for the one who does not intend to fast before dawn.  

لاَ صِيَامَ لِمَنْ لَمْ يُجْمِعِ الصِّيَامَ قَبْلَ الْفَجْرِ  

"None should fast except the one who intended to fast before dawn."  

أَنَّهُ كَانَ يَقُولُ لاَ يَصُومُ إِلاَّ مَنْ أَجْمَعَ الصِّيَامَ قَبْلَ الْفَجْرِ  

the Prophet said: "Whoever did not decide to fast before Fajr then there is no fast for him."  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ لَمْ يُجْمِعِ الصِّيَامَ قَبْلَ الْفَجْرِ فَلاَ صِيَامَ لَهُ  

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to say, "Only some one who makes the intention to fast before dawn (actually) fasts."  

أَنَّهُ كَانَ يَقُولُ لاَ يَصُومُ إِلاَّ مَنْ أَجْمَعَ الصِّيَامَ قَبْلَ الْفَجْرِ  

"مَنْ لَمْ يَجْمَعِ الصِّيَامَ قَبْلَ الْفَجْرِ فَلا صِيَامَ لَهُ".