Leviticus 18:11
The nakedness of thy father’s wife’s daughter, begotten of thy father, she is thy sister, thou shalt not uncover her nakedness.
Leviticus 18:11 (KJV)
Context
Leviticus belongs to the Torah, the laws God gave Israel through Moses. Chapter 18 lists sexual prohibitions, including incest, to keep the community holy and distinct from surrounding nations. These laws were given to set Israel apart from pagan practices and to protect the family as the basic unit of society.
Meaning
This verse forbids sexual relations with a half-sister, the daughter of one’s father by another wife. The phrase “uncover her nakedness” is a Hebrew euphemism for sexual intercourse. The command protects family boundaries and honors the sacredness of kinship. It specifically addresses a daughter “begotten of thy father,” clarifying that the prohibition applies even if she is not the daughter of one’s own mother. This reinforces the principle that family relationships carry a sacred honor that must not be violated.
Biblical connections
Leviticus 18:9 already forbids relations with a sister, whether full or half. Verse 11 repeats the rule for a paternal half-sister, making clear that even a sister from a different mother is protected. This law reflects the wider principle that sexual intimacy belongs only within the marriage covenant. The broader list of prohibitions in Leviticus 18 emphasizes holiness and purity, setting God’s people apart from the nations around them.
Application
Christians are not bound by Old Testament civil laws, but the principle remains: honor God by respecting family roles and avoiding sexual immorality. This includes guarding against any inappropriate intimacy that would damage trust or defile the family unit. For believers today, this commandment underscores the importance of sexual purity and the need to honor God in all relationships. It calls us to examine our own boundaries and to ensure that our conduct reflects the holiness God requires.
Reflection
God’s commands reveal His character and His desire for holiness. Jesus fulfilled the Law and gives believers the Holy Spirit to live pure lives. Through Him, we receive forgiveness and strength to follow God’s design for relationships. The holiness theme is fulfilled in Christ, who enables believers to live pure lives through the Spirit. As we reflect on this verse, we are reminded that God’s boundaries are not arbitrary but are given for our good and His glory.

