حَدَّثَنَا يَحْيَی بْنُ يَحْيَی وَمُحَمَّدُ بْنُ رُمْحٍ قَالَا أَخْبَرَنَا اللَّيْثُ ح و حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا لَيْثٌ عَنْ ابْنِ شِهَابٍ عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ عَنْ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُ عَنْ رَسُولِ اللَّهِ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّهُ قَالَ إِنَّ بِلَالًا يُؤَذِّنُ بِلَيْلٍ فَکُلُوا وَاشْرَبُوا حَتَّی تَسْمَعُوا تَأْذِينَ ابْنِ أُمِّ مَکْتُومٍ
صحیح مسلم · Hadith 2536
Sahl b. Sa'd (Allah be pleased with him) said: When this verse was revealed. Eat and drink till the white streak becomes distinct from the dark streak for you, the person who decided to observe fast tied on one of his feet a black thread and on the other a white thread. And he went on eating and drinking till he could distinguish (between their colour) on seeing them. It was after this that Allah reveal- ed (the words): min al-fajr. And they (the Muslims) came to know that (the word khait) refers to the night and day.
Sanad
حَدَّثَنَا يَحْيَی بْنُ يَحْيَی وَمُحَمَّدُ بْنُ رُمْحٍ قَالَا أَخْبَرَنَا اللَّيْثُ ح و حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا لَيْثٌ عَنْ ابْنِ شِهَابٍ عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ عَنْ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُ