Arabic (Original)
حَدَّثَنَا أَبُو عَامِرٍ حَدَّثَنَا سُلَيْمَانُ بْنُ بِلَالٍ عَنْ رَبِيعَةَ بْنِ أَبِي عَبْدِ الرَّحْمَنِ عَنْ عَبْدِ الْمَلِكِ بْنِ سَعِيدِ بْنِ سُوَيْدٍ الْأَنْصَارِيِّ قَالَ سَمِعْتُ أَبَا حُمَيْدٍ وَأَبَا أُسَيْدٍ يَقُولَانِ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا دَخَلَ أَحَدُكُمْ الْمَسْجِدَ فَلْيَقُلْ اللَّهُمَّ افْتَحْ لِي أَبْوَابَ رَحْمَتِكَ فَإِذَا خَرَجَ فَلْيَقُلْ اللَّهُمَّ إِنِّي أَسْأَلُكَ مِنْ فَضْلِكَ.
English Translation
It was narrated from Abu Humayd and Abu Usayd: they said, "The Messenger of Allah, peace and blessings be upon him, said, 'When one of you enters the mosque, let him say, "O Allah, open for me the doors of Your mercy," and when he leaves, let him say, "O Allah, I ask You of Your bounty."'"