Sunan Ibn Majah, Chapter: The Chapters of Establishing the Prayer and the Sunnah Regarding Them

"The Messenger of Allah (saw) came out to us and said: 'Whoever has some need from Allah or from any of His creation, let him perform ablution and pray two Rakah, then let him say: La ilaha illallahul-Halimul- Karim. Subhan-Allahi Rabbil-'arshil-'azim. Al-hamdu Lillahi Rabbil-'Alamin. Allahumma inni as'aluka mujibat rahmatika, wa 'aza'ima maghfiratika, wal-ghanimata min kulli barrin, was-salamata min kulli ithmnin. As'aluka alla tada'a li dhanban illa ghafartahu, wa la hamman illa farrajtahu, wa la hajah hiya laka irdan illa qadaitaha li (None has the right to be worshipped but Allah, the Forbearing, the Most Generous. Glory is to Allah, the Lord of the Mighty Throne. Praise is to Allah, the Lord of the worlds. O Allah, I ask You for the means of Your mercy and forgiveness, the benefit of every good deed and safety from all sins. I ask You not to leave any sin of mine but You forgive it, or any distress but You relieve it, or any need that is pleasing to You but You meet it). Then he should ask Allah for whatever he wants in this world and in the Hereafter, for it is decreed." Sahih