John Gill Commentary Leviticus 27:9

"And if it be a beast, whereof men offer an oblation unto Jehovah, all that any man giveth of such unto Jehovah shall be holy." — Leviticus 27:9 (ASV)

And if [it be] a beast whereof men bring an offering to the
Lord
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] gives 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.