Sahih Muslim
The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness (Kitab Al-Dhikr)
Book Number: 035 / Hadith Number: 6507
Anas reported that Allah's Messenger (may peace be upon him) used to supplicate (in these words):" Our Lord, grant us the good in this world and the good in the Hereafter and save us from the torment of Hell Fire."