عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((إِذَا رَأَيْتُمُ الرَّجُلَ يَعْتَادُ الْمَسْجِدَ فَاشْهَدُوا عَلَيْهِ بِالْإِيمَانِ، قَالَ اللَّهُ عَزَّ وَجَلَّ: {إِنَّمَا يَعْمُرُ مَسَاجِدَ اللَّهِ مَنْ آمَنَ بِاللَّهِ وَالْيَوْمِ الْآخِرِ}))
Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: When you see a man who is accustomed to coming and going to the mosque, then bear witness to his faith, because Allah Almighty says: Only those maintain the mosques of Allah who believe in Allah and the Last Day.