Mishkat al-Masabih 1327
Prayer
Optional Prayer - Section 2
‘Abdallah b. Abu Aufa reported God’s Messenger as saying: If anyone wants something from God, or from a human being, he should perform ablution and do it well, then pray two rak'as, then extol God most high and invoke blessing on the Prophet, then say, "There is no god but God, the Clement and Generous. Glory be to God, the Lord of the mighty throne. Praise be to God, the Lord of the universe. I ask You for words which will guarantee Your mercy, actions which will make certain Your forgiveness, a supply of every virtue, and freedom from every offence. Do not leave me a sin which You dost not pardon, a care which You dost not remove, or a want that meets with Your pleasure which You dost not supply, O most merciful of the merciful ones.” Tirmidhi and Ibn Majah transmitted it, and Tirmidhi said this is a gharib tradition.