Sahih Muslim Book: 7, Hadith: 1947

وَحَدَّثَنَاهُ إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا عِيسَى بْنُ يُونُسَ، حَدَّثَنَا الأَعْمَشُ، فِي هَذَا الإِسْنَادِ ‏.‏ بِنَحْوِ حَدِيثِهِمَا وَقَالَ إِنِّي لأَعْرِفُ النَّظَائِرَ الَّتِي كَانَ يَقْرَأُ بِهِنَّ رَسُولُ اللَّهِ صلى الله عليه وسلم اثْنَتَيْنِ فِي رَكْعَةٍ ‏.‏ عِشْرِينَ سُورَةً فِي عَشْرِ رَكَعَاتٍ ‏.‏ Abu Wa’il reported:One day we went to ‘Abdullah b. Mas’ud after we had observed the dawn prayer and we paid salutation at the door. He permitted us to enter, but we stayed for a while at the door, when the slave-girl came out and said: Why don’t you come in? So we went in and (we found ‘Abdullah b. Mas’ud) sitting and glorifying Allah (i. e. he was busy in dhikr) and he said: What obstructed you from coming in though you had been granted permission for it? We said: There was nothing (behind it) but we entertained the idea that some inmate of the house might be sleeping. He said: Do you presume any idleness on the part of the family o...