Messenger of Allah ﷺ did not leave a Dinar or a Dirham or a male or a female slave. He left only his white mule on which he used to ride, and his weapons, and a piece of land which he gave in charity for the needy travelers.  

مَا تَرَكَ رَسُولُ اللَّهِ ﷺ دِينَارًا وَلاَ دِرْهَمًا وَلاَ عَبْدًا وَلاَ أَمَةً إِلاَّ بَغْلَتَهُ الْبَيْضَاءَ الَّتِي كَانَ يَرْكَبُهَا وَسِلاَحَهُ وَأَرْضًا جَعَلَهَا لاِبْنِ السَّبِيلِ صَدَقَةً  

"The Messenger of Allah did not leave behind a Dinar nor a Dirham, or any slave, male or female; except his white mule which he used to ride, his weapon and some land which he left to be used for the cause of Allah." (One of the narrators) Qutaibah said on one occasion: "In charity."  

مَا تَرَكَ رَسُولُ اللَّهِ ﷺ دِينَارًا وَلاَ دِرْهَمًا وَلاَ عَبْدًا وَلاَ أَمَةً إِلاَّ بَغْلَتَهُ الشَّهْبَاءَ الَّتِي كَانَ يَرْكَبُهَا وَسِلاَحَهُ وَأَرْضًا جَعَلَهَا فِي سَبِيلِ اللَّهِ وَقَالَ قُتَيْبَةُ مَرَّةً أُخْرَى صَدَقَةً