Sahih Muslim 809
Sahih Muslim · Book 6: The Book of Prayer - Travellers · The virtue of Surat al-Kahf and Ayat al-Kursi
This hadith has been transmitted by Qatada with the same chain of transmitters. But Shu'ba (one of the narrators) said:
وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى ، وَابْنُ، بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ ، حَدَّثَنَا شُعْبَةُ ، ح وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ ، حَدَّثَنَا هَمَّامٌ ، جَمِيعًا عَنْ قَتَادَةَ ، بِهَذَا الإِسْنَادِ قَالَ شُعْبَةُ مِنْ آخِرِ الْكَهْفِ . وَقَالَ هَمَّامٌ مِنْ أَوَّلِ الْكَهْفِ كَمَا قَالَ هِشَامٌ .
At the end of Surah al-Kahf, but Hammam said: At the beginning of Surah al-Kahf.