(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." (TR)
Reference (TR): Jami` at-Tirmidhi 698 (TR)
In-book reference (TR): Book 8, Hadith 17 (TR)
English translation (TR): Vol. 2, Book 3, Hadith 698 (TR)