Sahih Muslim , Book 4, Hadith 1215 (USC-MSA) ⓘ
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.
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 .
also referenced under: Book 5, Hadith 160 (In-Book) & Hadith 586 (Reference)