Wherein is blemish - God must not have that offered to him which thou wouldst not use thyself. This not only refers to the perfect sacrifice offered by Christ Jesus, but to that sincerity and uprightness of heart which God requires in all those who approach him in the way of worship.
This verse belongs in subject to the last chapter. It prohibits once more (compare Deuteronomy 15:21) that form of insult to God which consists in offering to Him a blemished sacrifice.
Any evil-favoredness - Render any evil thing. The reference is to the faults or maims enumerated in Leviticus 22:22-24.