[If] one writes over his property [to others] while he is lying ill —- [if] he leaves land of any size [for himself], his gift is a gift; [if] he leaves no land at all [for himself], his gift is not a gift.  [If] one writes over his property to his sons, and assigns to his wife land of any size, she loses her marriage settlement. R' Yose says: If she accepts, then even though he did not assign her [anything], she loses her marriage settlement.