After (praising Allah and blessing the Prophet) that: The Messenger of Allah ﷺ used to command us to build mosques in our localities and keep them well and clean.
أَنَّهُ كَتَبَ إِلَى ابْنِهِ أَمَّا بَعْدُ فَإِنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَأْمُرُنَا بِالْمَسَاجِدِ أَنْ نَصْنَعَهَا فِي دِيَارِنَا وَنُصْلِحَ صَنْعَتَهَا وَنُطَهِّرَهَا