ذِكْرُ الْبَيَانِ بِأَنَّ إِعْمَارَ الْمَرْءِ دَارَهُ فِي حَيَاتِهِ مِنْ غَيْرِ ذِكْرِ وَرَثِتِهِ بَعْدَهُ لَا تَكُونُ الْعُمْرَى لِلْمُعْمَرِ لَهُ
The life-tenancy which the Messenger of Allah ﷺ allowed was only that one should say: It is for you and your descendants. When he says: It is yours as long as you live, it returns to its owner. (Using translation from Abū Dāʾūd 3555)
إِنَّمَا الْعُمْرَى الَّتِي أَجَازَهَا رَسُولُ اللَّهِ ﷺ أَنْ يَقُولَ «هِيَ لَكَ وَلِعَقِبِكَ مِنْ بَعْدِكَ فَأَمَّا إِذَا قَالَ هِيَ لَكَ مَا عِشْتَ فَإِنَّهَا تَرْجِعُ إِلَى صَاحِبِهَا»