Dua Upon Entering Mosque (For Namaz)

بِسْمِ اللَّهِ وَالصَّلاَةُ وَالسَّلاَمُ عَلَى رَسُولِ اللَّهِ، اللَّهُمَّ افْتَحْ لِي أَبْوَابَ رَحْمَتِكَ

Bismillahi was-salatu was-salamu 'ala Rasulillah, Allahumma aftah li abwaba rahmatik

“In the name of Allah, and peace and blessings be upon the Messenger of Allah. O Allah, open for me the doors of Your mercy.”