بُلُوغُ الْمَرَامِ
Bulugh al-Maram 251
The Book of Prayer
عَنْ عَائِشَةَ -رَضِيَ اَللَّهُ عَنْهَا- قَالَتْ : { أَمَرَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -بِبِنَاءِ اَلْمَسَاجِدِ فِي اَلدُّورِ , وَأَنْ تُنَظَّفَ , وَتُطَيَّبَ. } رَوَاهُ أَحْمَدُ , وَأَبُو دَاوُدَ , وَاَلتِّرْمِذِيُّ , وَصَحَّحَ إِرْسَالَهُ . [1]
Narrated 'Aishah (RA): Allah's Messenger (ﷺ) ordered that the mosques be built in residential districts and that it be cleaned and perfumed. [Reported by Ahmad, Abu Dawud, and at-Tirmidhi. The latter considered it Mursal [missing link in the chain after the Tabi'i (student of a Companion)].
Sunnah.com reference: Book 2, Hadith 122