When a man presents a peace offering to the LORD from the herd or flock to fulfill a vow or as a freewill offering, it must be without blemish or defect to be acceptable.
Jewish Publication Society of America Version (JPS1917) - Leviticus 22:21 >And whosoever bringeth a sacrifice of peace-offerings unto the LORD in fulfilment of a vow clearly uttered, or for a freewill-offering, of the herd or of the flock, it shall be perfect to be accepted; there shall be no blemish therein.