Sahih Muslim Book - 13, Hadith - 2543

وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ حَدَّثَنَا مُعْتَمِرُ بْنُ سُلَيْمَانَ ح وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ أَخْبَرَنَا جَرِيرٌ وَالْمُعْتَمِرُ بْنُ سُلَيْمَانَ كِلاَهُمَا عَنْ سُلَيْمَانَ التَّيْمِىِّ بِهَذَا الإِسْنَادِ. وَانْتَهَى حَدِيثُ الْمُعْتَمِرِ عِنْدَ قَوْلِهِ « يُنَبِّهُ نَائِمَكُمْ وَيَرْجِعُ قَائِمَكُمْ ». وَقَالَ إِسْحَاقُ قَالَ جَرِيرٌ فِى حَدِيثِهِ « وَلَيْسَ أَنْ يَقُولَ هَكَذَا وَلَكِنْ يَقُولُ هَكَذَا ». يَعْنِى الْفَجْرَ هُوَ الْمُعْتَرِضُ وَلَيْسَ بِالْمُسْتَطِيلِ.

It was narrated from Sulaiman At-Taimi with this chain (a Hadith similar to no.2541), but the Hadith of Al-Mu’tamir ends with the words: “so that the one who is asleep may wake up and the standing (one who is praying Qiyam) may return (to rest).” Ishaq said: “Jarir said in his Hadith: ’It is not when it is like this, rather it is when it is like this’ – meaning the dawn – ‘It is the horizontal one, not the vertical one.’”