Leviticus 21:18 (c) The word is used to remind us that the believer must have a sacrifice that is absolutely perfect in every respect. The only sacrifice that GOD will accept as being perfect is the Lord JESUS. Nothing else and no one else can be truly perfect.
2 Peter 2:13 (b) This reference is to those people who are unsaved and therefore untaught in the Word of GOD who come among GOD's people bringing damage, hurt and injury to GOD's program.