حَدَّثَنِي مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ الأَنْصَارِيِّ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ أَيُّمَا رَجُلٍ أُعْمِرَ عُمْرَى لَهُ وَلِعَقِبِهِ فَإِنَّهَا لِلَّذِي يُعْطَاهَا لاَ تَرْجِعُ إِلَى الَّذِي أَعْطَاهَا أَبَدًا ‏"‏ ‏.‏ لأَنَّهُ أَعْطَى عَطَاءً وَقَعَتْ فِيهِ الْمَوَارِيثُ ‏.‏

Malik related to me from Ibn Shihab from Abu Salama ibn Abd ar-Rahman ibn Awf from Jabir ibn Abdullah al-Ansari that the Messenger ofAllah, may Allah bless him and grant him peace, said, "If someone isgiven a life pension, for him and his posterity, it belongs to theperson to whom it has been given. It never reverts to the one who gaveit because he gave a gift and the rules of inheritance apply to it." Translation Not Available

Book Ref: Muwatta Imam Malik Book 36 Hadith 1446
Web Ref:  Muwatta Imam Malik Book 36 Hadith 43