Narrated 'Aisha:

(the wife of the Prophet) Allah's Apostle used to invoke Allah in the prayer saying "Allahumma inni a'udhu bika min adhabil-qabri, wa a'udhu bika min fitnatil-masihid-dajjal, wa a'udhu bika min fitnatil-mahya wa fitnatil-mamati. Allahumma inni a'udhu bika minal-ma thami wal-maghrami. (O Allah, I seek refuge with You from the punishment of the grave and from the afflictions of Masi,h Ad-Dajjal and from the afflictions of life and death. O Allah, I seek refuge with You from the sins and from being in debt)." Somebody said to him, "Why do you so frequently seek refuge with Allah from being in debt?" The Prophet replied, "A person in debt tells lies whenever he speaks, and breaks promises whenever he makes (them)." 'Aisha also narrated: I heard Allah's Apostle in his prayer seeking refuge with Allah from the afflictions of Ad-dajjal.

حَدَّثَنَا أَبُو الْيَمَانِ، قَالَ أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنَا عُرْوَةُ بْنُ الزُّبَيْرِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ ﷺ أَخْبَرَتْهُ أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَدْعُو فِي الصَّلاَةِ " اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ الْقَبْرِ وَأَعُوذُ بِكَ مِنْ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ، وَأَعُوذُ بِكَ مِنْ فِتْنَةِ الْمَحْيَا وَفِتْنَةِ الْمَمَاتِ، اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْمَأْثَمِ وَالْمَغْرَمِ ". فَقَالَ لَهُ قَائِلٌ مَا أَكْثَرَ مَا تَسْتَعِيذُ مِنَ الْمَغْرَمِ فَقَالَ " إِنَّ الرَّجُلَ إِذَا غَرِمَ حَدَّثَ فَكَذَبَ، وَوَعَدَ فَأَخْلَفَ ". وَعَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي عُرْوَةُ، أَنَّ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَسْتَعِيذُ فِي صَلاَتِهِ مِنْ فِتْنَةِ الدَّجَّالِ