It is narrated from Sayyidah Fatimah, the daughter of the Messenger of Allah, may Allah be pleased with her and grant her satisfaction, that when the Messenger of Allah, peace and blessings be upon him, would enter the mosque, he would send blessings and peace upon Muhammad, peace and blessings be upon him, and in one narration, he would recite this supplication: "Bismillah, was-salamu ‘ala Rasulillah" (In the name of Allah, and peace be upon the Messenger of Allah), and then he would recite: "Allahumma ighfir li dhunubi waftah li abwaba rahmatik." (O Allah! Forgive my sins and open for me the doors of Your mercy.) And when he, peace and blessings be upon him, would leave, he would send blessings and peace upon Muhammad, peace and blessings be upon him, and in one narration, he would say: "Bismillah, was-salamu ‘ala Rasulillah," and then recite this supplication: "Allahumma ighfir li dhunubi waftah li abwaba fadlik." (O Allah! Forgive my sins and open for me the doors of Your bounty.)