"A bed for a man, a bed for his wife, a third for his guest and the fourth is for the Shaitan."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ فِرَاشٌ لِلرَّجُلِ وَفِرَاشٌ لأَهْلِهِ وَالثَّالِثُ لِلضَّيْفِ وَالرَّابِعُ لِلشَّيْطَانِ