References to this verse are not present in important magisterial documents and in the principal writings of the Fathers of the Church. It is the consensus of Catholic biblical commentators that this prohibition is not part of the unchanging moral law, but part of the ritual law specific to the Old Testament. Many commentators believe that this prohibition was intended to separate Israel from its Canaanite neighbors; some believe that the cuttings in the flesh and tattoo marks to which the verse refers were part of idolatrous Canaanite worship.
The context of the verse favors this interpretation. The preceding verse reads, “You shall not round off the hair on your temples or mar the edges of your beard” (Lev. 19:27)—this prohibition is certainly not applied to members of the Church.