Sunan an-Nasai 18486
In-book no 3750أَخْبَرَنَا عِيسَى بْنُ مُسَاوِرٍ، قَالَ حَدَّثَنَا الْوَلِيدُ، قَالَ حَدَّثَنَا أَبُو عَمْرٍو، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي سَلَمَةَ، عَنْ جَابِرٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " الْعُمْرَى لِمَنْ أُعْمِرَهَا هِيَ لَهُ وَلِعَقِبِهِ يَرِثُهَا مَنْ يَرِثُهُ مِنْ عَقِبِهِ " .
(A different chain) from Abu 'Amr, from Ibn Shihab, from Abu Salamah, from Jabir, who said: "The Messenger of Allah said: 'Umra (a lifelong gift) belongs to the one to whom it was given; it belongs to him and to his heirs, and is inherited by those among his descendants who inherit from him.'"