Leviticus 27:9

“And if [it be] a beast whereof men bring an offering to the Lord, etc.] That is, it such a creature is devoted, which is of that kind which are used in sacrifice to the Lord, such as bullocks, sheep, goats, rams, and lambs: all that [any man] giveth of such unto the Lord shall be holy; shall be set apart to sacred uses, and not applied to profane or common uses, but either were for the use of the altar or of the priests; or the price of them for the repair of the sanctuary, according as they were devoted.”

“if it be a beast, whereof men bring an offering unto the Lord--a clean beast. After it had been vowed, it could neither be employed in common purposes nor exchanged for an equivalent--it must be sacrificed--or if, through some discovered blemish, it was unsuitable for the altar, it might be sold, and the money applied for the sacred service. If an unclean beast--such as an ass or camel, for instance, had been vowed, it was to be appropriated to the use of the priest at the estimated value, or it might be redeemed by the person vowing on payment of that value, and the additional fine of a fifth more.”

“Whereof men bring an offering - That is, a clean beast. Giveth - Voweth to give: Shall be holy - Consecrated to God, either to be sacrificed, or to be given to the priest, according to the manner of the vow, and the intention of him that voweth. Leviticus 27:10”

“27:9-10 Once an acceptable animal had been vowed and the priest at the sanctuary had accepted it on God’s behalf, the animal became holy and belonged to God.”

“all: is holy, i.e. separated and devoted; it cannot be redeemed like a human being, a house, or a field (Young), Lev 27:9 Leviticus 27:10”

“When animals were vowed, of the cattle that were usually offered in sacrifice, everything that was given to Jehovah of these (i.e., dedicated to Him by vowing) was to be holy and not changed, i.e., exchanged, a good animal for a bad, or a bad one for a good. But if such an exchange should be made, the animal first dedicated and the one substituted were both to be holy ( Lev 27:9, Lev 27:10). The expression "it shall be holy" unquestionably implies that an animal of this kind could not be redeemed; but if it was free from faults, it was offered in sacrifice: if, however, it was not fit for sacrifice on account of some blemish, it fell to the portion of the priests for their maintenance like…”