Leviticus
Leviticus 27:33
He may not make search to see if it is good or bad, or make any changes in it; and if he makes exchange of it for another, the two will be holy; he will not get them back again.
Leviticus 27:10
It may not be changed in any way, a good given for a bad, or a bad for a good; if one beast is changed for another, the two will be holy.
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