Sayyiduna Jabir bin Abdullah (may Allah be pleased with both of them) narrates: That 'Umra which the Prophet (peace and blessings of Allah be upon him) declared permissible refers to saying: "This is yours and after you, it will belong to your heirs." As for saying: "This is yours as long as you live," then the owner of that thing can take it back.
Hadith Referenceصحیح ابن حبان / كتاب الرقبى والعمرى / 5139
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «الإرواء» (1612): م.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما