وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ أَبِي الزُّبَيْرِ الْمَكِّيِّ، عَنْ طَاوُسٍ الْيَمَانِيِّ، عَنْ عَبْدِ اللَّهِ بْنِ عَبَّاسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُعَلِّمُهُمْ هَذَا الدُّعَاءَ كَمَا يُعَلِّمُهُمُ السُّورَةَ مِنَ الْقُرْآنِ يَقُولُ ‏"‏ اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ جَهَنَّمَ وَأَعُوذُ بِكَ مِنْ عَذَابِ الْقَبْرِ وَأَعُوذُ بِكَ مِنْ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ وَأَعُوذُ بِكَ مِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ ‏"‏ ‏.‏

Yahya related to me from Malik from Abu'zZubayr al-Makki fromTawus al-Yamani from Abdullah ibn Abbas that the Messenger of Allah,may Allah bless him and grant him peace, used to teach this dua in thesame way that he would teach them a sura of the Qur'an, "O Allah, Iseek refuge in You from the torment of Jahannam, and I seek refuge inYou from the trial of the Dajjal, and I seek refuge in You from thetrial of life and death." Allahumma inniy audhu bika minadhabi jahannama, wa audhu bika min adhabi'l-qabri, wa audhu bika minfitnati'l-mahya wa mamati. Translation Not Available

Book Ref: Muwatta Imam Malik Book 15 Hadith 505
Web Ref:  Muwatta Imam Malik Book 15 Hadith 33