Sahih Muslim | Book 35 | Hadith Number 6515

Narrated by Abu Malik
Abu Malik reported on the authority of his father that when a person embraced Islam, Allah's Messenger (may peace be upon him) used to teach him how to observe prayer and then commanded him to supplicate in these words: "O Allah, grant me pardon, have mercy upon me, direct me to the path of righteousness, grant me protection and provide me sustenance.