Hadithcore
Sahih al-Bukhari, 3759, 3760
sahih

Narrated `Abdullah bin `Amr:

Allah's Messenger (ﷺ) neither talked in an insulting manner nor did he ever speak evil intentionally. He used to say, "The most beloved to me amongst you is the one who has the best character and manners." He added, " Learn the Qur'an from (any of these) four persons. `Abdullah bin Mas`ud, Salim the freed slave of Abu Hudhaifa, Ubai bin Ka`b, and Mu`adh bin Jabal."

حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، حَدَّثَنَا شُعْبَةُ، عَنْ سُلَيْمَانَ، قَالَ سَمِعْتُ أَبَا وَائِلٍ، قَالَ سَمِعْتُ مَسْرُوقًا، قَالَ قَالَ عَبْدُ اللَّهِ بْنُ عَمْرٍو إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم لَمْ يَكُنْ فَاحِشًا وَلاَ مُتَفَحِّشًا وَقَالَ ‏"‏ إِنَّ مِنْ أَحَبِّكُمْ إِلَىَّ أَحْسَنَكُمْ أَخْلاَقًا ‏"‏‏.‏ وَقَالَ ‏"‏ اسْتَقْرِئُوا الْقُرْآنَ مِنْ أَرْبَعَةٍ مِنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ، وَسَالِمٍ مَوْلَى أَبِي حُذَيْفَةَ، وَأُبَىِّ بْنِ كَعْبٍ، وَمُعَاذِ بْنِ جَبَلٍ ‏"‏‏.‏

References2 variants
In-Book Reference
Book 62, Hadith 105
USC-MSA web (English) reference
Vol. 5, Book 57, Hadith 104 (deprecated numbering scheme)