Nedarim

MISHNAH. HE WHO IS FORBIDDEN BY VOW TO BENEFIT FROM HIS NEIGHBOUR, [IF THE VOW WAS IMPOSED] BEFORE THE SEVENTH YEAR,  MAY NOT ENTER HIS FIELD [IN THE SEVENTH YEAR]  NOR TAKE OF THE OVERHANGING [FRUIT].  BUT IF [THE VOW WAS IMPOSED] IN THE SEVENTH YEAR, HE MAY NOT ENTER HIS FIELD, BUT MAY EAT OF THE OVERHANGING BRANCHES.  IF HE WAS [MERELY] FORBIDDEN IN RESPECT OF FOOD [BUT NOT ALL BENEFIT], [AND THE VOW WAS IMPOSED] BEFORE THE SEVENTH YEAR, HE MAY ENTER HIS FIELD, BUT MAY NOT EAT OF ITS FRUITS; BUT [IF IT WAS IMPOSED] IN THE SEVENTH YEAR, HE MAY ENTER [HIS FIELD] AND EAT [OF ITS FRUITS]. GEMARA. Rab and Samuel both ruled: [If one says to his neighbour], 'This my property [be forbidden] to you', [if he vowed] before the seventh year, he may not enter his field or take of the overhanging [fruits] even when the seventh year arrives. But if he vowed in the seventh year, he may not enter his field, yet may enjoy the overhanging [fruits]. R. Johanan and Resh Lakish both maintained [If one says to his neighbour,] 'This my property [be forbidden] to you'; [if he vowed] before the seventh year he may neither enter his field nor eat of the overhanging [fruits]; when the seventh year arrives, he may not enter his field, yet may eat of the overhanging [fruits]. Shall we say that they differ in this: Rab and Samuel hold that a man can prohibit [unto others] that which is in his ownership, [for the prohibition to be effective] even after it passes out of his ownership;  whilst R. Johanan and Resh Lakish maintain: One cannot prohibit [unto others] that which is in his ownership [for the prohibition to continue even] after it leaves his ownership? Now can you reason so? Does anyone rule that a person cannot declare prohibited that which is his, even after it passes out of his ownership? If so, let them differ with reference to 'this property [be forbidden etc.],' and how much more so would it apply to 'this my property!'  Moreover, we have learnt that a person can declare prohibited that which is in his ownership for even after it leaves his ownership. For we learnt: If one says to his son, 'Konam, if you benefit from me,' — if he dies, he inherits him.  [But if he explicitly stipulates] during his lifetime and after his death,