It was narrated that Muslim bin Abi Bakrah (RA) said: “My father used to say following every prayer: ‘Allahumma inni a-udhu bika min al-kufri wal-faqri wa ‘adhab al-qabr. (O Allah, I seek refuge with You from Kufr, poverty, and the torment of the grave)’ and I used to say them (these words). My father said: ‘O my son, from whom did you learn this?’ I said: ‘From you. He said: “The Messenger of Allah (peace be upon him) used to say them following the prayer.'”
Sunan an-Nasa’i, Book 13, Hadith 169
