بِسْمِ اللَّهِ وَالصَّلَاةُ وَالسَّلَامُ عَلَىٰ رَسُولِ اللَّهِ، اللَّهُمَّ افْتَحْ لِي أَبْوَابَ رَحْمَتِكَ
Bismillah, wassalatu wassalamu 'ala Rasulillah. Allahummaf-tah li abwaba rahmatik
In the Name of Allah, and peace and blessings be upon the Messenger of Allah. O Allah, open for me the gates of Your mercy.
The full Sunnah when entering the masjid: step in with the right foot, say Bismillah, send salawat upon the Prophet ﷺ, then ask Allah to open the gates of His mercy. The masjid is Allah's house — you enter it as a guest seeking His hospitality. "Abwab rahmatik" (gates of Your mercy) is plural — not one gate but many, because the masjid is a place where countless forms of mercy converge: prayer, knowledge, community, forgiveness, and divine closeness. When leaving, the du'a changes to asking for fadl (bounty), reflecting the shift from spiritual focus to worldly responsibility.
Related Du'as
غُفْرَانَكَ
I seek Your forgiveness.
Sahihسُبْحَانَ الَّذِي سَخَّرَ لَنَا هَٰذَا وَمَا كُنَّا لَهُ مُقْرِنِينَ وَإِنَّا إِلَىٰ رَبِّنَا لَمُنقَلِبُونَ
Glory to the One who has subjected this for us, and we could never have it by our own efforts. And indeed, to our Lord we will surely return.
Sahihالسَّلَامُ عَلَيْكُمْ أَهْلَ الدِّيَارِ مِنَ الْمُؤْمِنِينَ وَالْمُسْلِمِينَ وَإِنَّا إِنْ شَاءَ اللَّهُ بِكُمْ لَاحِقُونَ نَسْأَلُ اللَّهَ لَنَا وَلَكُمُ الْعَافِيَةَ
Peace be upon you, O inhabitants of these dwellings, believers and Muslims. Indeed, we will, Allah willing, join you. We ask Allah for well-being for us and for you.
Sahihالْحَمْدُ لِلَّهِ الَّذِي عَافَانِي مِمَّا ابْتَلَاكَ بِهِ وَفَضَّلَنِي عَلَى كَثِيرٍ مِّمَّنْ خَلَقَ تَفْضِيلًا
Praise be to Allah who has spared me from what He has afflicted you with, and has favored me greatly over many of His creation.
Hasan