(12) باب مَا جَاءَ إِذَا أَقْبَلَ اللَّيْلُ وَأَدْبَرَ النَّهَارُ فَقَدْ أَفْطَرَ الصَّائِمُ
Umar bin Al-Khattab narrated that:
The Messenger of Allah said: "When the night advances and the day retreats, and the sun is hidden, then the fast is to be broken." (FR)
Reference (FR): Jami` at-Tirmidhi 698 (FR)
In-book reference (FR): Book 8, Hadith 17 (FR)
English translation (FR): Vol. 2, Book 3, Hadith 698 (FR)