Sunan an-Nasa'i, Hadith 3385 ⓘ
It was narrated from Jabir bin 'Abdullah that the Messenger of Allah said: "A bed for a man, a bed for his wife, a third for his guest and the fourth is for the Shaitan."
أَخْبَرَنَا يُونُسُ بْنُ عَبْدِ الأَعْلَى، قَالَ أَنْبَأَنَا ابْنُ وَهْبٍ، قَالَ أَخْبَرَنِي أَبُو هَانِئٍ الْخَوْلاَنِيُّ، أَنَّهُ سَمِعَ أَبَا عَبْدِ الرَّحْمَنِ الْحُبُلِيَّ، يَقُولُ عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " فِرَاشٌ لِلرَّجُلِ وَفِرَاشٌ لأَهْلِهِ وَالثَّالِثُ لِلضَّيْفِ وَالرَّابِعُ لِلشَّيْطَانِ " .
also referenced under: Book 26, Hadith 190 (In-Book) & Volume 4, Book 26, Hadith 3387 (DarusSalam)