Incest in the Bible refers to sexual relations between certain close kinship relationships which are prohibited by the Hebrew Bible. These prohibitions are found predominantly in Leviticus 18:8-18 and 20:11-21, but also in Deuteronomy. The biblical categories of prohibited relationships does not entirely match the modern definitions of prohibited incestuous relations in force in various countries or of the various Christian denominations. (see Affinity (canon law) and Laws regarding incest.)