The Prophet ﷺ said: Do not give property to go to the survivor and do not give life-tenancy. If anyone is given something to the survivor or given life-tenancy, it goes to his heirs. (Using translation from Abū Dāʾūd 3556)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لَا تُعْمِرُوا وَلَا تُرْقِبُوا فَمَنْ أُعْمِرَ شَيْئًا أَوْ أُرْقِبَهُ فَهُوَ سَبِيلُ الْمِيرَاثِ  

“Umra belongs to the one to whom it is given, and Ruqba belongs to the one to whom it is given.” (Using translation from Ibn Mājah 2383)   

قَالَ رَسُولُ اللهِ ﷺ الْعُمْرَى جَائِزَةٌ لِمَنْ أُعْمِرَهَا وَالرُّقْبَى جَائِزَةٌ لِمَنْ أُرْقِبَهَا  

The Prophet ﷺ said: If anyone gives something in life-tenancy, it belongs to the one to whom it is given, in his life and after his death; and do not give property to go to the survivor, for if anyone gives something to to to the survivor, it belongs to him. (Using translation from Abū Dāʾūd 3559)   

قَالَ رَسُولُ اللهِ ﷺ مَنْ أَعْمَرَ شَيْئًا فَهُوَ لِمُعْمَرِهِ مَحْيَاهُ وَمَمَاتَهُ وَلَا تُرْقِبُوا فَمَنْ أَرْقَبَ شَيْئًا فَهُوَ سَبِيلُهُ وَفِي رِوَايَةِ شِبْلٍ فَهُوَ سَبِيلُ الْمِيرَاثِ