Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Ibn Umar (may Allah be pleased with them both) that Hazrat Umar received a piece of land in Khaybar. So he presented himself before the Noble Prophet (peace and blessings be upon him) and asked him about that land, and said: "I have received such a land in Khaybar that, in my opinion, I have never received better wealth than this. What do you command me regarding it?" The Prophet (peace and blessings be upon him) said: "If you wish, withhold its corpus and give its benefit (i.e., its profit) in charity." The narrator says that Hazrat Umar gave it in charity. But this condition remained that its corpus was neither sold nor gifted, nor did it pass on as inheritance. Thus, Hazrat Umar gave its (profit) in charity to the poor, relatives, for the freeing of slaves, in the way of Allah, to travelers and guests. Whoever is the guardian of the endowment, there is no harm if he eats from it according to his need or feeds a non-wealthy friend from it.

Hazrat Ibn Tawoos narrates from his father that Hajar Madari informed me that the family of the Holy Prophet (peace and blessings be upon him) used to eat from the charity (land) of the Prophet in a manner sufficient for their needs and in the best way. And (Imam) Abu Hanifa's opinion has been mentioned that: The heirs have the right to reclaim the endowment.