Messenger of Allah ﷺ visited a household among the Ansars, and he took a meal with them. When he intended to leave, he asked for a place in that house for him, to pray so a mat sprinkled with water was put and he offered prayer over it, and invoked for Allah's Blessing upon them (his hosts).  

أَنَّ رَسُولَ اللَّهِ ﷺ زَارَ أَهْلَ بَيْتٍ فِي الأَنْصَارِ فَطَعِمَ عِنْدَهُمْ طَعَامًا فَلَمَّا أَرَادَ أَنْ يَخْرُجَ أَمَرَ بِمَكَانٍ مِنَ الْبَيْتِ فَنُضِحَ لَهُ عَلَى بِسَاطٍ فَصَلَّى عَلَيْهِ وَدَعَا لَهُمْ