Sayyiduna Jabir (may Allah be pleased with him) narrates: I heard the Prophet Muhammad (peace and blessings be upon him) say: "Whoever gives something to someone as 'Umra (a gift for life), then it will belong to that person and to his heirs. (The giver) by his statement has separated his right from that thing; it will be the property of the one to whom it was given as 'Umra and the property of his heirs."
Hadith Referenceصحیح ابن حبان / كتاب الرقبى والعمرى / 5138
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - وهو مكرر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح