Leviticus 27:10

Contemporary English Version (Anglicised) 2012

If you try to substitute any other animal, no matter how good, for the one you promised, they will both become holy and must be sacrificed.

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and they must never sell or trade any of this land—it is the best land and belongs to me.

Donkeys are unfit for sacrifice, so if you promise me a donkey, you must bring it to the priest,

If you promise to sacrifice an animal to me, it becomes holy, and there is no way you can set it free.