We used to go to Abdullah b. 'Amr and talk to him, Ibn Numair said: One day we made a mention of Abdullah b. Mas'ud, whereupon he said: You have made mention of a person whom I love more than anything else. I heard Messenger of Allah ﷺ as saying: Learn Qur'an from four persons: Ibn Umm 'Abd (i. e. 'Abdullah b. Mas'ud) he started from him-then Mu'adh b. Jabal and Ubayya b. Ka'b, then Salim the ally of Abu Hudhaifa. (Using translation from Muslim 2464a)
قَالَ رَسُولُ اللهِ ﷺ خُذُوا الْقُرْآنَ مِنْ أَرْبَعَةٍ مِنَ ابْنِ مَسْعُودٍ وَأُبَيِّ بْنِ كَعْبٍ وَمُعَاذِ بْنِ جَبَلٍ وَسَالِمٍ مَوْلَى أَبِي حُذَيْفَةَ قَالَ فَقَالَ عَبْدُ اللهِ فَذَاكَ رَجُلٌ لَا أَزَالُ أُحِبُّهُ مُنْذُ رَأَيْتُ رَسُولَ اللهِ ﷺ بَدَأَ بِهِ