It was narrated from Ibn Mas'ood (رضي الله عنه) that

The Messenger of Allah (ﷺ) said: “Whoever says, "O Allah, Creator of the heavens and the earth, Knower of the unseen and the seen, I give You my covenant in the life of this world that I bear witness that there is no God but You alone with no partner or associate, and that Muhammad is Your slave and Your Messenger; if you leave me to my own devices, You will cause me to get closer to evil and cause me to get further away from good. Verily I trust nothing but Your mercy, so make a covenant for me with You, that You will fulfil for me on the Day of Resurrection, for You never break Your covenant,’ Allah will say to His Angels on the Day of Resurrection: ‘My slave made a covenant with Me, so fulfil it for him.’ And Allah will admit him to Paradise." Suhail said: and al-Qasim bin ‘Abdur-Rahman told me that "Awn told him such and such. He said: There is no young girl among our family who does not say this (du 'a') in her seclusion.