The Book of Mosques and Places of Prayer
حَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ أَشْعَثَ، عَنْ أَبِيهِ، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ، بِهَذَا الْحَدِيثِ وَفِيهِ قَالَتْ وَمَا صَلَّى صَلاَةً بَعْدَ ذَلِكَ إِلاَّ سَمِعْتُهُ يَتَعَوَّذُ مِنْ عَذَابِ الْقَبْرِ .Masruq reported this hadith on the authority of 'A'isha who said:Never did he (the Holy Prophet) say prayer after this in which I did not hear him seeking refuge from the torment of the grave
From Sahih Muslim, whose reports the scholars accept as authentic.