Merriam-Webster defines “Incest” as follows: “sexual intercourse between persons so closely related that they are forbidden by law to marry; also: the statutory crime of such a relationship.” Such a term is not appropriate for this question because it implies sin or the breaking of a moral law. Under the Patriarchal Law (Genesis and perhaps Job), God, who has all authority and power to establish law and abolish law (Psalm 78:5; Ephesians 2:14-16; Hebrews 10:9, 16), authorized the marriage of a brother to his sister, etc. (

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