Messenger of Allah ﷺ said, "My heirs will not inherit a Dinar or a Dirham (i.e. money), for whatever I leave (excluding the adequate support of my wives and the wages of my employees) is given in charity."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَقْتَسِمْ وَرَثَتِي دِينَارًا مَا تَرَكْتُ بَعْدَ نَفَقَةِ نِسَائِي وَمَئُونَةِ عَامِلِي فَهْوَ صَدَقَةٌ  

When ʿUmar founded an endowment he stipulated that its administrator could eat from it and also feed his friend on the condition that he would not store anything for himself from it.  

أَنْ يَأْكُلَ مَنْ وَلِيَهُ وَيُوكِلَ صَدِيقَهُ غَيْرَ مُتَمَوِّلٍ مَالاً