Invocation for Entering the Mosque

"أَعُوذُ بِاللهِ الْعَظِيمِ، وَبِوَجْهِهِ الْكَرِيمِ، وَسُلْطَانِهِ الْقَدِيمِ، مِنَ الشَّيْطَانِ الرَّجِيمِ". [بِسْمِ اللهِ، وَالصَّلَاةُ وَالسَّلَّامُ عَلَى رَسُولِ اللهِ] "اللَّهُمَّ افْتَحْ لِي أَبْوَابَ رَحْمَتِكَ".

20. '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.¹ [in the name of allah, and blessings.]² [and peace be upon the messenger of allah.]³ o allah, open before me the doors of your mercy.⁴

reference:
¹ abu dawud and al-albani, sahihul-jdmi' as-saghir (hadithno. 4591).
² ibn as-sunni (hadith no. 88), graded good by al-albani.
³ abu dawud 1/126, see also al-albani, sahihul-jami'as-saghir 1/528.
⁴muslim 1/494. there is also a report in sunan ibn majah on the authority of fatimah (ra), : "o allah, forgive me my sins and open for me the doors of your mercy." it was graded authentic by al-albani due to supporting ahadith. see sahih ibn majah 1/128-9.