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أَخْبَرَنَا سُلَيْمَانُ بْنُ عُبَيْدِ اللَّهِ الْغَيْلَانِيُّ بَصْرِيٌّ قَالَ حَدَّثَنَا أَبُو عَامِرٍ قَالَ حَدَّثَنَا سُلَيْمَانُ عَنْ رَبِيعَةَ عَنْ عَبْدِ الْمَلِكِ بْنِ سَعِيدٍ قَالَ سَمِعْتُ أَبَا حُمَيْدٍ وَأَبَا أُسَيْدٍ يَقُولَانِقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا دَخَلَ أَحَدُكُمْ الْمَسْجِدَ فَلْيَقُلْ اللَّهُمَّ افْتَحْ لِي أَبْوَابَ رَحْمَتِكَ وَإِذَا خَرَجَ فَلْيَقُلْ اللَّهُمَّ إِنِّي أَسْأَلُكَ مِنْ فَضْلِكَ

Narrated to us [Sulaiman bin Ubaidullah Al Ghailani Bashri] he said :Narrated to us [Abu 'Amir] he said :Narrated to us [Sulaiman] from [Rabi'ah] from [Abdul Malik bin Sa'id] he said : I heard [Abu Humaid] and [Abu Usaid] both say; that the Prophet sallallaahu'alaihi wasallam said: "When one of you enters the mosque, then let him say, 'O Allah, open for me the doors of Your mercy'. If you leave the mosque, then let him say, 'O Allah, I ask for Your mercy'."