תלמוד על סוטה 8:1

MISHNAH: If anything is given instead of money, if one entered in possession, the other is obligated for its exchange⁵²¹If property is acquired by payment in kind, only one of the parties has to execute an act of taking possession. The other party then automatically is in possession and also assumes liability. This is not simple barter but exchange of money’s worth against money’s worth.. How is this? If an ox was exchanged for a cow, or a donkey for an ox, if one entered in possession, the other is obligated for its exchange. Possession of Heaven is by money⁵²²For the Temple, possession comes together with ownership by payment; it does not need a separate act on entering into possession., possession of an individual by taking hold. A promise to Heaven is like delivery to an individual⁵²³Anything vowed to Heaven is as if delivered; the promise cannot be retracted..