We were in the house of Abu Musa along with some of the companions of 'Abdullah and they were looking at the Holy Book. 'Abdullah stood up, whereupon Abu Mas'ud said: I do not know whether Messenger of Allah, ﷺ has left after him one having a better knowledge (of Islam) than the man who is standing. Abu Musa said: If you say this, that is correct, because he had been present when we had been absent and he was permitted when we were detained. (Using translation from Muslim 2461b)
كُنَّا فِي دَارِ أَبِي مُوسَى مَعَ نَفَرٍ مِنْ أَصْحَابِ رَسُولِ اللهِ ﷺ وَهُمْ يَنْظُرُونَ فِي مُصْحَفٍ فَقَامَ عَبْدُ اللهِ فَقَالَ أَبُو مَسْعُودٍ «مَا أَعْلَمُ رَسُولَ اللهِ ﷺ تَرَكَ بَعْدَهُ أَحَدًا أَعْلَمُ بِمَا أَنْزَلَ اللهُ ﷻ مِنْ هَذَا الْقَائِمِ» فَقَالَ أَبُو مُوسَى «أَمَا لِأَنْ قُلْتَ ذَاكَ لَقَدْ كَانَ يَشْهَدُ إِذَا غِبْنَا وَيُؤْذَنُ لَهُ إِذَا حُجِبْنَا»