Narrated `Aisha: (the wife of the Prophet) Allah's Apostle used to invoke Allah in the prayer saying "Allahumma inni a`udhu bika min `adhabi l-qabr, wa a`udhu bika min fitnati l-masihi d-dajjal, wa a`udhu bika min fitnati l-mahya wa fitnati l-mamat. Allahumma inni a`udhu bika mina l-ma'thami wa l-maghram. (O Allah, I seek refuge with You from the punishment of the grave, from the afflictions of the imposter- Messiah, and from the afflictions of life and death. O Allah, I seek refuge with You from sins and from 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.

Narrated Abu Bakr As-Siddiq: I asked Allah's Apostle to teach me an invocation so that I may invoke Allah with it in my prayer. He told me to say, "Allahumma inni zalumtu nafsi zulman kathiran, Wala yaghfiru dh-dhunuba illa anta, fa ghfir li maghfiratan min `indika, wa r-hamni, innaka anta l-ghafuru r-rahim (O Allah! I have done great injustice to myself and none except You forgives sins, so bestow on me a forgiveness from You, and Have Mercy on me, You are the Forgiver, the Merciful).