Hisnul Muslim 20

Upon entering the mosque

أَعوذُ بِاللّهِ العَظِيـمِ، وَبِوَجْهِـهِ الكَرِيـمِ وَسُلْطـَانِه القَدِيـمِ، مِنَ الشَّيْـطَانِ الرَّجِـيمِ، بِسْـمِ اللّهِ وَالصَّلَاةُ وَالسَّلامُ عَلَى رَسُولِ اللّهِ، اَللَّهُـمَّ افْتَـحْ لِي أَبْوَابَ رَحْمَتـِكَ

'A'oothu billaahil-'Adheem, wa bi-Wajhihil-Kareem, wa Sultaanihil-qadeem, minash-Shaytaanir-rajeem. Bismillaahi, wassalaatu. Wassalaamu 'alaaRasoolillaahi. Allaahum-maftah lee 'abwaaba rahmatika.

I seek refuge in Almighty Allah, by His Noble Face, by His primordial power, from Satan the outcast. In the Name of Allah, and blessings and peace be upon the Messenger of Allah. O Allah, open before me the doors of Your mercy.