Musannaf Ibn Abi Shayba 21:409

Waki' narrated to us, from Sufyan, from Abu Ishaq, from Abu Ubaydah, who said: Abdullah used to say when he exerted himself in supplication: "O Allah, I ask You for Your bounty which You have bestowed upon me, and Your good trial with which You have tested me, and Your favors which You have blessed me with, that You admit me into Paradise. O Allah, admit me into Paradise by Your mercy, Your forgiveness, and Your bounty."