Sunan an-Nasa'i 3601

Ishaq ibn Ibrahim reported to us: Azhar as-Samman narrated to us, from Ibn 'Awn, from Nafi', from Ibn 'Umar, that 'Umar acquired land at Khaybar and went to the Prophet (peace and blessings be upon him) to seek his advice. He said, ‘If you wish, you may preserve its principal and give it in charity.’ So he retained its principal, stipulating that it not be sold, given away, or inherited, and gave its benefits to the poor, relatives, the emancipation of slaves, the needy, travelers, and guests. The administrator bears no blame if he takes from it reasonably or feeds a friend, without accumulating wealth from it.