Ibn Jurayj ابن جريج · The Book of 'Umra

It was narrated from Zaid bin Thabit that the Prophet ruled that 'Umra (a gift given for life) belongs to the heir.

The Messenger of Allah said: "Whoever gives a life-long gift, it belongs to the one to whom he gave it, both during his life and after his death. And do not give things on the basis of Ruqba, for whoever is given something on the basis of Ruqba, it becomes part of his estate."

It was narrated from Tawus that the Messenger of Allah made 'Umra and Ruqba binding.