The Messenger of Allah (ﷺ) used to recite this dua:

اَللَّهُمَّ إِنِّي أَعُوْذُ بِكَ مِنْ فِتْنَةِ النَّارِ وَعَذَابِ النَّارِ، وَفِتْنَةِ الْقَبْرِ وَعَذَابِ الْقَبْرِ، وَشَرِّ فِتْنَةِ الْغِنَى، وَشَرِّ فِتْنَةِ الْفَقْرِ، اَللَّهُمَّ إِنِّي أَعُوْذُ بِكَ مِنْ شَرِّ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ، اَللَّهُمَّ اغْسِلْ قَلْبِي بِمَاءِ الثَّلْجِ وَالْبَرَدِ، وَنَقِّ قَلْبِي مِنَ الْخَطَايَا، كَمَا نَقَّيْتَ الثَّوْبَ الْأَبْيَضَ مِنَ الدَّنَسِ، وَبَاعِدْ بَيْنِي وَبَيْنَ خَطَايَاىَ كَمَا بَاعَدْتَ بَيْنَ الْمَشْرِقِ وَالْمَغْرِبِ، اَللَّهُمَّ إِنِّي أَعُوْذُ بِكَ مِنَ الْكَسَلِ وَالْمَأْثَمِ وَالْمَغْرَمِ

Allaahumma inni A‛oodhu bika min fitnatin-naar, wa 'adhaabin-naar, wa fitnatil-qabr wa 'adhaabil-qabr, wa sharri fitnatil-ghina, wa sharri fitnatil-faqr, Allaahumma inni A‛oodhu bika min sharri fitnatil-masihid-dajjaal. Allaahummaghsil qalbi bimaa'ith-thalji wal-barad, wa naqqi qalbi minal-khata-yaa kamaa naqqaytath-thawbal-abyada minad-danas. Wa baa'id bayni wa bayna khata-ya-ya kamaa baa'adta baynal-mashriqi wal-maghrib. Allaahumma inni A‛oodhu bika minal-kasali wal-ma'thami wal-maghram

O Allah! I seek refuge with You from the affliction of the Fire, the punishment of the Fire, the affliction of the grave, the punishment of the grave, and the evil of the affliction of poverty. O Allah! I seek refuge with You from the evil of the affliction of Al-Masih Ad- Dajjal, O Allah! Cleanse my heart with the water of snow and hail, and cleanse my heart from all sins as a white garment is cleansed from filth, and let there be a far away distance between me and my sins as You made the East and West far away from each other. O Allah! I seek refuge with You from laziness, senility, sins, and from being in debt.

Reference: Bukhari: 6377