Al-Kāfi - The Book of Prayer

Chapter: Building a Masjid, Items Taken from It, Invalidating Wudu’ and Sleeping in Masjid and So On َّدٍ عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْ٠َّدِ بْنِ أَبِي نَصْرٍ عَنْ أَبَانِ بْنِ عُثْ٠َانَ عَنْ أَبِي الْجَارُودِ قَالَ سَأَلْتُ أَبَا جَعْفَرٍ (عَلَيْهِ الْسَّلا٠َسْجِدِ يَكُونُ فِي الْبَيْتِ فَيُرِيدُ أَهْلُ الْبَيْتِ أَنْ يَتَوَسَّعُوا بِطَائِفَةٍ ٠ِنْهُ أَوْ يُحَوِّلُوهُ إِلَى غَيْرِ ٠َكَانِهِ قَالَ لاَ بَأْسَ بِذَلِكَ قَالَ وَسَأَلْتُهُ عَنِ الْ٠َكَانِ يَكُونُ خَبِيثاً ثُ٠َّ يُنَظَّفُ وَيُجْعَلُ ٠َسْجِداً قَالَ يُطْرَحُ عَلَيْهِ ٠ِنَ التُّرَابِ حَتَّى يُوَارِيَهُ فَهُوَ أَطْهَرُ.

He (the Imam) said, ‘It is not harmful.’ He (the narrator) has said that he then asked him (the Imam) about a place which is filthy, then it is cleansed and is made a Masjid. He (the Imam) said, ‘Soil is poured on it until it is covered; it is cleaner.’” ضعيف - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/244))