Prohibition of Incestuous Relationships
God sets clear boundaries for sexual relationships to preserve holiness and protect the covenant community.
Leviticus 18:6-18 (BSB)
6 None of you are to approach any close relative to have sexual relations. I am the LORD.
7 You must not expose the nakedness of your father by having sexual relations with your mother. She is your mother; you must not have sexual relations with her.
8 You must not have sexual relations with your father’s wife; it would dishonor your father.
9 You must not have sexual relations with your sister, either your father’s daughter or your mother’s daughter, whether she was born in the same home or elsewhere.
10 You must not have sexual relations with your son’s daughter or your daughter’s daughter, for that would shame your family.
11 You must not have sexual relations with the daughter of your father’s wife, born to your father; she is your sister.
12 You must not have sexual relations with your father’s sister; she is your father’s close relative.
13 You must not have sexual relations with your mother’s sister, for she is your mother’s close relative.
14 You must not dishonor your father’s brother by approaching his wife to have sexual relations with her; she is your aunt.
15 You must not have sexual relations with your daughter-in-law. She is your son’s wife; you are not to have sexual relations with her.
16 You must not have sexual relations with your brother’s wife; that would shame your brother.
17 You must not have sexual relations with both a woman and her daughter. You are not to marry her son’s daughter or her daughter’s daughter and have sexual relations with her. They are close relatives; it is depraved.
18 You must not take your wife’s sister as a rival wife and have sexual relations with her while your wife is still alive.
What is the big idea of Leviticus 18:6-18?
God sets clear boundaries for sexual relationships to preserve holiness and protect the covenant community.
How does Leviticus 18:6-18 point to Christ?
The strict boundaries around sexual relationships reveal that God’s design for human life is ordered, holy, and protective, showing that sin distorts relationships and must be resisted.
How does Leviticus 18:6-18 relate to the life and ministry of Jesus?
The passage is not directly about the earthly life of Jesus, but it forms part of the Torah's holiness witness that exposes sin and guards the sanctity of human relationships. Christ fulfills the righteousness to which the law bears witness and creates a redeemed people whose sexual ethics are governed by holiness, love, and self-giving purity rather than exploitation.
Authorial Intent
This passage defines prohibited sexual unions within close family relationships, establishing clear boundaries to preserve holiness and covenant order in Israel.
Questions for Reflection
- Why does God establish such detailed boundaries for sexual relationships?
- How do these commands protect the integrity of the family?
- What does this passage teach about God’s design for human relationships?
- How should believers respond to cultural confusion about sexuality?
Literary Context
Leviticus 18 begins the holiness-code material with a contrast between Egypt, Canaan, and the LORD's revealed statutes. Verses 1-5 established the covenant logic: Israel must not imitate pagan patterns but must walk in the LORD's decrees. Verses 6-18 now apply that covenant call to the household by prohibiting sexual unions with close relatives and relationally bound family members.
Historical Context
The commands are given to Israel after the exodus and within the Sinai covenant context, as the LORD forms a people distinct from Egypt behind them and Canaan before them.
Chapter: Leviticus 18
Sexual Holiness, Covenant Distinction, and the Land That Vomits Out Defilement
The LORD's redeemed people must reject the sexual practices of Egypt and Canaan and live by His holy statutes, because sexual rebellion defiles persons, households, worship, and the land itself.