حَدَّثَنَا ابْنُ نُمَيْرٍ أَخْبَرَنَا هِشَامٌ عَنْ أَبِيهِ عَنْ عَاصِمٍ عَنْ عُمَرَ بْنِ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا أَقْبَلَ اللَّيْلُ وَأَدْبَرَ النَّهَارُ وَغَابَتْ الشَّمْسُ فَقَدْ أَفْطَرْتَ
مسند امام احمد بن حنبل · Hadith 231
It was narrated that 'Umar bin al-Khattab (RA) said: The Messenger of Allah (PBUH) said: "When night comes and day departs, and the sun sets, then (it is time to) break your fast."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020