Musannaf Ibn Abi Shayba 21:412

Hushaym narrated to us, Husayn informed us, from Abu al-Yaqzan Husayn ibn Yazid al-Tha'labi, from Abdullah ibn Mas'ud, that he used to say when he finished the prayer: "O Allah, I ask You for the requirements of Your mercy, the determinations of Your forgiveness, the spoils of every righteousness, and safety from every sin. O Allah, I ask You for success in attaining Paradise and salvation from the Fire. O Allah, do not leave a sin except that You have forgiven it, nor a worry except that You have relieved it, nor a need except that You have fulfilled it."