Hadith 656
The mother of the believers, Hafsah (RAA) narrated that The Messenger of Allah (P.B.U.H.) said, “Whoever does not form his intention to fast before to fajr, his fasting will not be accepted.” Related by the five Imams, but At-Tirmidhi and An-Nasa’i consider it to be related by Hafsah and not connected to the Prophet (P.B.U.H.). Imam Ad-Daraqutni transmitted, "No fasting is accepted for one who does not form the intention (to fast) the night before.”
وَعَنْ حَفْصَةَ أُمِّ اَلْمُؤْمِنِينَ رَضِيَ اَللَّهُ عَنْهَا, عَنِ اَلنَّبِيِّ - صلى الله عليه وسلم -قَالَ: { مَنْ لَمْ يُبَيِّتِ اَلصِّيَامَ قَبْلَ اَلْفَجْرِ فَلَا صِيَامَ لَهُ } رَوَاهُ اَلْخَمْسَةُ, وَمَالَ النَّسَائِيُّ وَاَلتِّرْمِذِيُّ إِلَى تَرْجِيحِ وَقْفِهِ, وَصَحَّحَهُ مَرْفُوعًا اِبْنُ خُزَيْمَةَ وَابْنُ حِبَّانَ <sup>1</sup> . وَلِلدَّارَقُطْنِيِّ: { لَا صِيَامَ لِمَنْ لَمْ يَفْرِضْهُ مِنَ اَللَّيْلِ } <sup>2</sup> .