Jabir (Allah be pleased with him) said: The Umra for which Messenger of Allah ﷺ gave sanction that a person way say: This (property) is for you and for your descendants. And when he said: That is for you as long as you live, then it will return to its owner (after the death of the donee). Ma'mar said: Zuhri used to give religious verdict according to this.

حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَعَبْدُ بْنُ حُمَيْدٍ، - وَاللَّفْظُ لِعَبْدٍ - قَالاَ أَخْبَرَنَا عَبْدُ، الرَّزَّاقِ أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ أَبِي سَلَمَةَ، عَنْ جَابِرٍ، قَالَ إِنَّمَا الْعُمْرَى الَّتِي أَجَازَ رَسُولُ اللَّهِ ﷺ أَنْ يَقُولَ هِيَ لَكَ وَلِعَقِبِكَ . فَأَمَّا إِذَا قَالَ هِيَ لَكَ مَا عِشْتَ . فَإِنَّهَا تَرْجِعُ إِلَى صَاحِبِهَا . قَالَ مَعْمَرٌ وَكَانَ الزُّهْرِيُّ يُفْتِي بِهِ .