Al-Lu'lu Wal-Marjan 1056 — The Book of Al-Wasiyya (Wills and Testaments)

Ibn 'Umar Narrated from:

'Umar bin Al-Khattâb got some land in Khaibar and he went to the Prophet ﷺ to consult him about it: saying, "O Allâh's Messenger! I got some land in Khaibar better than which I have never had, what do you suggest that I do with it?" The Prophet ﷺ said, "If you like you can give the land as endowment and give its fruits in charity." So 'Umar gave it in charity as an endowment on the condition that it would not be sold nor given to anybody as a present and not to be inherited, but its yield would be given in charity to the poor, to the kith and kin, for freeing slaves, for use in Allâh's Cause, to the travellers and guests; and that there would be no harm if the guardian of the endowment ate from it with Ma'rûf (according to his labour with good intention), and feed others without storing it for the future." ( Sahîh Al-Bukhâri, Hadîth No. 895, Vol. 3 )