Leviticus 27:27

27 If it is one of the unclean animals, it may be bought back at its set value, adding a fifth of the value to it. If it is not redeemed, it is to be sold at its set value.

Read Leviticus 27:27 Using Other Translations

And if it be of an unclean beast, then he shall redeem it according to thine estimation, and shall add a fifth part of it thereto: or if it be not redeemed, then it shall be sold according to thy estimation.
And if it is an unclean animal, then he shall buy it back at the valuation, and add a fifth to it; or, if it is not redeemed, it shall be sold at the valuation.
However, you may buy back the firstborn of a ceremonially unclean animal by paying the priest’s assessment of its worth, plus 20 percent. If you do not buy it back, the priest will sell it at its assessed value.

What does Leviticus 27:27 mean?

John Gill's Exposition of the Bible
Leviticus 27:27

And if [it be] of an unclean beast
This is to be understood, not of the firstling of unclean creatures in common, which were to be redeemed with a lamb, and not with money, according to the estimation of the priest, and a fifth part added to that; but of such as were sanctified, or vowed, for the reparation of the sanctuary, as Jarchi notes:

then he shall redeem [it] according to thine estimation;
the price the priest should set upon it, how much it was worth in his judgment:

and shall add a fifth [part] of it thereto;
to the price, set upon a fifth part of that over and above the sum; this the sanctifier, or he that made the vow, was obliged to pay, if he thought fit to redeem it:

or if it be not redeemed;
by him, he does not choose to give the price, and the fifth part:

then it shall be sold according to thy estimation;
to another man, without the fifth part, that chooses to purchase it, and then the purchase money was laid out for sacred uses.

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