Sayyiduna Abdullah bin Buraydah (may Allah be pleased with him) narrates from his father that the Messenger of Allah (peace and blessings be upon him) said: "Whoever says: 'Allahumma anta rabbi la ilaha illa ant, khalaqtani wa ana 'abduk, wa 'ala 'ahdika wa wa'dika mastata't, a'udhu bika min kulli ma sana't, wa abu'u bidhanbi, faghfir li dhunubi, innahu la yaghfirudh-dhunuba illa ant' (O Allah, You are my Lord; there is no god but You. You created me and I am Your servant, and I remain upon Your covenant and Your promise as much as I am able. I seek refuge in You from the evil of what I have done. I acknowledge my sins before You, so forgive me my sins, for indeed none forgives sins except You), and then he dies on that day or that night, he will enter Paradise." This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.