Entering and exiting the mosque

أَعُوذُ بِاللَّهِ الْعَظِيمِ، وَبِوَجْهِهِ الْكَرِيمِ، وَسُلْطَانِهِ الْقَدِيمِ، مِنَ الشَّيْطَانِ الرَّجِيمِ. بِسْمِ اللَّهِ وَالصَّلَاةُ وَالسَّلَامُ عَلَى رَسُولِ اللَّهِ. اللَّهُمَّ افْتَحْ لِي أَبْوَابَ رَحْمَتِكَ

Aʿūdhu bi-llāhi-l-ʿaẓīm, wa bi-wajhihi-l-karīm, wa sulṭānihi-l-qadīm, mina-sh-shayṭāni-r-rajīm. Bismi-llāhi wa-ṣ-ṣalātu wa-s-salāmu ʿalā rasūli-llāh. Allāhumma-ftaḥ lī abwāba raḥmatik.

I seek refuge with Allāh, the Immense, by His Noble Face and His eternal authority, from Satan, the accursed. In the Name of Allāh, and peace and blessings be upon the Messenger of Allāh. O Allāh, open for me the doors of Your mercy. (upon entering)

Source : Abū Dāwūd

بِسْمِ اللَّهِ وَالصَّلَاةُ وَالسَّلَامُ عَلَى رَسُولِ اللَّهِ، اللَّهُمَّ إِنِّي أَسْأَلُكَ مِنْ فَضْلِكَ، اللَّهُمَّ اعْصِمْنِي مِنَ الشَّيْطَانِ الرَّجِيمِ

Bismi-llāhi wa-ṣ-ṣalātu wa-s-salāmu ʿalā rasūli-llāh, Allāhumma innī as'aluka min faḍlik, Allāhumma-ʿṣimnī mina-sh-shayṭāni-r-rajīm.

In the Name of Allāh, and peace and blessings be upon the Messenger of Allāh; O Allāh, I ask You of Your bounty; O Allāh, protect me from Satan, the accursed. (upon exiting)

Source : Ibn Mājah