(33) باب مَا جَاءَ لاَ صِيَامَ لِمَنْ لَمْ يَعْزِمْ مِنَ اللَّيْلِ
Hafsah narrated that:
the Prophet said: "Whoever did not decide to fast before Fajr then there is no fast for him." (AR)
Reference (AR): Jami` at-Tirmidhi 730 (AR)
In-book reference (AR): Book 8, Hadith 49 (AR)
English translation (AR): Vol. 2, Book 3, Hadith 730 (AR)