حَدَّثَنَا ابْنُ أَبِي عُمَرَ حَدَّثَنَا سُفْيَانُ عَنْ مُجَالِدٍ عَنْ الشَّعْبِيِّ عَنْ عَدِيِّ بْنِ حَاتِمٍ قَالَ سَأَلْتُ رَسُولَ اللَّهِ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ الصَّوْمِ فَقَالَ حَتَّی يَتَبَيَّنَ لَکُمْ الْخَيْطُ الْأَبْيَضُ مِنْ الْخَيْطِ الْأَسْوَدِ قَالَ فَأَخَذْتُ عِقَالَيْنِ أَحَدُهُمَا أَبْيَضُ وَالْآخَرُ أَسْوَدُ فَجَعَلْتُ أَنْظُرُ إِلَيْهِمَا فَقَالَ لِي رَسُولُ اللَّهِ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ شَيْئًا لَمْ يَحْفَظْهُ سُفْيَانُ قَالَ إِنَّمَا هُوَ اللَّيْلُ وَالنَّهَارُ قَالَ أَبُو عِيسَی هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ
جامع ترمذی · Hadith 2971
Narrated 'Adi bin Hatim: I asked the Messenger of Allah (ﷺ) about the fast, he said: 'Until the white (light) thread of dawn appears distinct to you from the black thread (of night)' - he said: So I took two ropes, one white and the other black to look at them. So the Messenger of Allah (ﷺ) said to me - it was something that Sufyan (a sub narrator) did not remember - so he said: It is only the night and the day.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020