Nedarim

Now according to R. Huna, let us see; It is an asmakta,  and an asmakta gives no title?  — Here it is different, because he had deposited his rights.  And where they are deposited, is it not an asmakta? But we learnt: If one repaid a portion of his debt, and then placed the bond in the hands of a third party, and declared, 'If I do not repay [the balance] within thirty days, return the bill to the creditor,'  and the time came and he did not repay, R. Jose maintained: He [the third party] must surrender the bond to the [creditor]; R. Judah maintained: He must not surrender it. And R. Nahman said in the name of Rabbah b. Abbahu in Rab's name: The halachah is not as R. Jose, who ruled that an asmakta gives a legal claim.  — Here it is different, because he had declared, 'These rights shall be void.'  Now the law is: an asmakta does give a legal claim, providing that no unavoidable accident supervened and that a formal acquisition was made  at an authoritative Beth din. MISHNAH. ONE MAY VOW TO MURDERERS,  ROBBERS,  AND PUBLICANS THAT IT [THE PRODUCE WHICH THEY DEMAND] IS TERUMAH, EVEN IF IT IS NOT,  OR THAT IT BELONGS TO THE ROYAL HOUSE, EVEN IF IT DOES NOT. BETH SHAMMAI MAINTAIN: ONE MAY MAKE ANY FORM OF VOW,