It was narrated from Anas bin Malik that Umm Sulaim asked the Messenger of Allah ﷺ to come to her and pray in her house so that she could take (the place where he prayed) as a Musalla (prayer place). So he came to her and she went and got a reed mat and sprinkled it with water, and he prayed on it, and they prayed with him.  

أَنَّ أُمَّ سُلَيْمٍ سَأَلَتْ رَسُولَ اللَّهِ ﷺ أَنْ يَأْتِيَهَا فَيُصَلِّيَ فِي بَيْتِهَا فَتَتَّخِذَهُ مُصَلًّى فَأَتَاهَا فَعَمَدَتْ إِلَى حَصِيرٍ فَنَضَحَتْهُ بِمَاءٍ فَصَلَّى عَلَيْهِ وَصَلَّوْا مَعَهُ  

[Machine] Um Sulaym asked the Prophet (PBUH) to pray in her house so that they could make it a place of prayer. He went to her in a bedsheet that she or they had spread out, and she sprinkled it with water. He then prayed on it and they prayed with him.  

أَنَّ أُمَّ سُلَيْمٍ «سَأَلَتِ النَّبِيَّ ﷺ أَنْ يُصَلِّيَ فِي بَيْتِهَا لِيَتَّخِذُونَهُ مُصَلًّى فَأَتَاهَا إِلَى حَصِيرٍ لَهَا أَوْ لَهُمْ فَنَضَحَتْهُ بِمَاءٍ فَصَلَّى عَلَيْهِ وَصَلُّوا مَعَهُ»