صحيح مسلم
Sahih Muslim
كتاب صلاة المسافرين وقصرها
The Book of Prayer - Travellers
باب اسْتِحْبَابِ صَلاَةِ الضُّحَى وَأَنَّ أَقَلَّهَا رَكْعَتَانِ وَأَكْمَلَهَا ثَمَانِ رَكَعَاتٍ وَأَوْسَطَهَا أَرْبَعُ رَكَعَاتٍ أَوْ سِتٌّ وَالْحَثِّ عَلَى الْمُحَافَظَةِ عَلَيْهَا:
Chapter: It is recommended to pray Duha, the least of which is two rak`ah, the best of which is eight, and the average of which is four or six, and encouragement to do so regularly
Hadith 719
This hadith is listed as number 1666 in Maktaba Shamila
وحَدَّثَنَا إِسْحَاق بْنُ إِبْرَاهِيمَ ، وَابْنُ بَشَّارٍ جَمِيعًا ، عَنْ مُعَاذِ بْنِ هِشَامٍ ، قَالَ : حَدَّثَنِي أَبِي ، عَنْ قَتَادَةَ ، بِهَذَا الإِسْنَادِ مِثْلَهُ .
A hadith like this has been narrated by Qatada with the same chain of transmitters.
