His house was but a hut with walls of unbaked clay and a thatched roof of palm leaves covered by camel skin and slept in hard mat leaving marks on his body.
Once a few of his disciples, noticing the imprint of his mattress on his body, wished to give him a softer bed but he politely declined the offer saying,
“What do I have to do with the world! I am not in the world but as a traveller seeking shade under a tree, then he catches his breath and leaves it.” 
He is like no other:
نَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم عَلَى حَصِيرٍ فَقَامَ وَقَدْ أَثَّرَ فِي جَنْبِهِ فَقُلْنَا يَا رَسُولَ اللَّهِ لَوِ اتَّخَذْنَا لَكَ وِطَاءً، فَقَالَ مَا لِي وَمَا لِلدُّنْيَا مَا أَنَا فِي الدُّنْيَا إِلاَّ كَرَاكِبٍ اسْتَظَلَّ تَحْتَ شَجَرَةٍ ثُمَّ رَاحَ وَتَرَك
“The Messenger of Allah (s.a.w) was sleeping upon a mat, then he stood, and the mat had left marks on his side. We said: ‘O Messenger of Allah! We could get a bed for you.’ He said: ‘What do I have to do with the world! I am not in the world but as a traveller seeking shade under a tree, then he catches his breath and leaves it.”