Sahih Muslim
Sahih Muslim 819 b
The clarification that the Qur’an was revealed in seven ahruf (modes of recitation), and clarifying its meaning
Arabic hadith text
وَحَدَّثَنَاهُ عَبْدُ بْنُ حُمَيْدٍ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، بِهَذَا الإِسْنَادِ
Translation
This hadith has been narrated by Zuhri with the same chain of trans- mitters.