27 " 'Do not cut the hair at the sides of your head or clip off the edges of your beard.
5 " 'Priests must not shave their heads or shave off the edges of their beards or cut their bodies.
Laws concerning the priests.
As these priests were types of Christ, so all ministers must be followers of him, that their example may teach others to imitate the Saviour. Without blemish, and separate from sinners, He executed his priestly office on earth. What manner of persons then should his ministers be! But all are, if Christians, spiritual priests; the minister especially is called to set a good example, that the people may follow it. Our bodily infirmities, blessed be God, cannot now shut us out from his service, from these privileges, or from his heavenly glory. Many a healthful, beautiful soul is lodged in a feeble, deformed body. And those who may not be suited for the work of the ministry, may serve God with comfort in other duties in his church.
Matthew Henry's Commentary on Leviticus 19:27
There are some ceremonial precepts in this chapter, but most of these precepts are binding on us, for they are explanations of the ten commandments. It is required that Israel be a holy people, because the God of Israel is a holy God, verse 35. We must make conscience of obeying God's precepts. We are not to pick and choose our duty, but must aim at standing complete in all the will of God. And the nearer our lives and tempers are to the precepts of God's law, the happier shall we be, and the happier shall we make all around us, and the better shall we adorn the gospel.