Jabir reported the Prophet as saying, “Do not give property to go to the survivor* and do not give life-tenancy, for if anyone is given either the property goes to his heirs."
*This is said to be objectionable, as it may lead to the men hoping the other will die first.
He said that the life-tenancy which God’s Messenger 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.
He reported the Prophet as saying, “Both life-tenancy and giving property which goes to the survivor are a gift which belongs to those who receive it."
He reported God’s Messenger as saying, “If anyone has property [[given him for the use of himself and his descendants it belongs to the one to whom it is given and does not return to the one who gave it because he gave a gift which may be inherited.”