كتاب صلاة المسافرين وقصرها
6  
The Book of Prayer - Travellers
(39)
Chapter: It is recommended to recite the Qur’an to people of virtue who are skilled in its recitation, even if the reciter is better than the one to whom it is recited
(39)
باب اسْتِحْبَابِ قِرَاءَةِ الْقُرْآنِ عَلَى أَهْلِ الْفَضْلِ وَالْحُذَّاقِ فِيهِ وَإِنْ كَانَ الْقَارِئُ أَفْضَلَ مِنَ الْمَقْرُوءِ عَلَيْهِ
Sahih Muslim 799 c

Qatada said:

I heard Anas saying that the Messenger of Allah (ﷺ) said to Ubayy the same thing.
حَدَّثَنَا يَحْيَى بْنُ حَبِيبٍ الْحَارِثِيُّ، حَدَّثَنَا خَالِدٌ، - يَعْنِي ابْنَ الْحَارِثِ - حَدَّثَنَا شُعْبَةُ، عَنْ قَتَادَةَ، قَالَ سَمِعْتُ أَنَسًا، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم لأُبَىٍّ بِمِثْلِهِ ‏.‏
Reference : Sahih Muslim 799c
In-book reference : Book 6, Hadith 294
USC-MSA web (English) reference : Book 4, Hadith 1749
  (deprecated numbering scheme)