And said this for three times in every morning and in evening:
اَللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْكُفْرِ وَالْفَقْرِ اَللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ الْقَبْرِ لَا إِلَهَ إِلَّا أَنْتَ
اَللّٰهُمَّ اِنِّىْ اَعُوْذُ بِكَ مِنَ الْكُفْرِ وَالْفَقْرِ اَللّٰهُمَّ اِنِّىْ اَعُوْذُ بِكَ مِنْ عَذَابِ الْقَبْرِ لَا اِلٰهَ اِلَّا اَنْتَ
Allaahumma 'innee 'a'oodhu bika minal-kufri, wal-faqr, Allaahumma 'innee 'a'oodhu bika min 'adhaabil-qabr, laa 'ilaaha 'illaa 'Anta
O Allah, I seek refuge in You from disbelief and poverty. O Allah! I seek refuge in You from the punishment of the grave. There is none worthy of worship but You.
He said: I heard the Messenger of Allah (ﷺ) using these words as a supplication and I like to follow his sunnah.