Encyclopedia of Prophetic Hadiths

The Messenger of Allah (may Allah's peace and blessings be upon him) saw a man praying alone behind the row, so he commanded him to repeat his prayer.

"When any of you enters the mosque, let him send peace upon the Prophet and say: Allāhumma iftahli abwāba rahmatik (O Allah, open for me the gates of Your mercy). And when he leaves, let him send peace upon the Prophet and say: Allāhumma i‘simni min ash-shaytān ar-rajīm (O Allah, protect me from the accursed devil)." In another narration by Al-Hākim: "When he leaves, let him send peace upon the Prophet (ﷺ) and say: Allāhumma ajirni min ash-shaytān ar-rajīm (O Allah, save me from the accursed devil)."

The Prophet (may Allah's peace and blessings be upon him) used to say between the two prostrations: "Allahumma ighfir li warhamni wa ‘āfeni wahdeni warzuqni (O Allah, forgive me, have mercy on me, grant me safety, guide me, and provide for me)".