O Allah, open for me the gates of Your mercy. (When entering the mosque) — Mosque Adhkar
اللَّهُمَّ افْتَحْ لِي أَبْوَابَ رَحْمَتِكَ
Transliteration: Allaahumma-ftah lee abwaaba rahmatik
Translation: O Allah, open for me the gates of Your mercy. (When entering the mosque)
Reference: Muslim 1:494