It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that among the supplications of the Messenger of Allah (peace and blessings be upon him) was also this one: 'Allahumma inna nas'aluka mujibati rahmatik, wa 'aza'ima maghfiratik, was-salamata min kulli ithm, wal-ghanimata min kulli birr, wal-fawza bil-jannah, wan-najata bi'awnika minan-nar' (O Allah, we ask You for the things that bring about Your mercy, the deeds that make Your forgiveness certain, safety from every sin, an abundant share of every righteous deed, success in attaining Paradise, and salvation from the Fire with Your help). This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.