Incest: Abraham
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In the biblical narrative, the topic of incest is addressed in various contexts, one of which involves the patriarch Abraham. The account of Abraham's marriage to Sarah, who is identified as his half-sister, is a notable instance that has been the subject of much discussion and interpretation within biblical scholarship.

Biblical Account

The relationship between Abraham and Sarah is first introduced in Genesis 11:29-31, where Sarah is mentioned as the wife of Abram (later named Abraham). The specific familial connection is clarified in Genesis 20:12, where Abraham explains to Abimelech, king of Gerar, "Besides, she really is my sister, the daughter of my father—though not of my mother—and she became my wife" . This verse indicates that Sarah was Abraham's half-sister, sharing the same father, Terah, but having a different mother.

Cultural and Historical Context

In the ancient Near Eastern context, marriages between close relatives, including half-siblings, were not uncommon and were often practiced to preserve family lineage and property. The cultural norms of the time permitted such unions, which were later explicitly prohibited in the Mosaic Law. Leviticus 18:9 states, "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" . This prohibition reflects a shift in the legal and moral standards given to the Israelites.

Theological Implications

The marriage of Abraham and Sarah, despite its classification as incest by later standards, is presented in the Bible without explicit condemnation. Abraham is regarded as a man of faith, and his covenantal relationship with God is central to the biblical narrative. The focus on Abraham's faith and obedience, as seen in passages like Genesis 15:6, "Abram believed the LORD, and it was credited to him as righteousness" , underscores the theological emphasis on faith over legalistic adherence in the patriarchal narratives.

Interpretative Considerations

From a conservative Christian perspective, the account of Abraham and Sarah is often understood within the framework of progressive revelation. This view suggests that God's moral and legal instructions were revealed progressively over time, culminating in the comprehensive laws given to Moses. The absence of explicit condemnation of Abraham's marriage to Sarah in the Genesis account is seen as reflective of the cultural and historical context rather than an endorsement of incestuous relationships.

Conclusion

The narrative of Abraham and Sarah provides insight into the complexities of biblical family dynamics and the evolving understanding of moral and legal standards in Scripture. While later biblical law clearly prohibits incest, the account of Abraham and Sarah is situated within a broader theological narrative that emphasizes faith and covenantal relationship with God.
Nave's Topical Index
Genesis 20:12,13
And yet indeed she is my sister; she is the daughter of my father, but not the daughter of my mother; and she became my wife.
Nave's Topical Index

Library

Abraham, his Trial in Egypt; his Humility
... Husbands, not to beat their wives, [863]154; how to treat them, [864]155; Abraham
a pattern of, [865]155. ... economy), [880]413. Incest, its foulness, [881]83. ...
/.../abraham his trial in egypt.htm

The Seventh Commandment
... Sarah obeyed Abraham, calling him lord.' 1 Pet 3: 6. ... The worst kind of uncleanness,
incest with the nearest of kin, is dispensed with for money. ...
/.../watson/the ten commandments/2 7 the seventh commandment.htm

Book 1 Footnotes:
... Without such an unavoidable necessity, incest is a horrid crime; but whether in ... Josephus
here calls that principal Angel, who appeared to Abraham and foretold ...
/.../josephus/the antiquities of the jews/book 1 footnotes .htm

Against Heresies
... Chapter XXV.--Both covenants were prefigured in Abraham, and in the labour of Tamar ...
them types of things to come: an example of this in the incest committed by ...
//christianbookshelf.org/irenaeus/against heresies/

Theophilus.
... INDEX OF SUBJECTS. Abel, 105. Abraham, 107. Adam, 105. ... Philosophers, absurd opinions
concerning God, 95. teach cannibalism, incest, and other crimes, 112. ...
/.../clement/who is the rich man that shall be saved/theophilus.htm

Index of Subjects.
... 902]190; Noah's drunkenness, [903]190; Noah's sons, [904]190; Abraham and Isaac ... Christ,
[921]242 etc.; actions and persons, [922]305; Judah's incest, [923]305 ...
/.../writings in connection with the donatist controversy /index of subjects.htm

Chapter xxxvii
... Christ. Abraham exemplifies the Father's love who gave up His only-begotten
Son. ... For Reuben had sacrificed his claim by incest. Simeon ...
/.../leupold/exposition of genesis volume 1/chapter xxxvii.htm

Chapter xliii
... to have grown in solidity of character since his sin of incest, unwittingly committed ...
Almighty" ('el shadday), Who was the covenant God of Abraham, is besought ...
/.../christianbookshelf.org/leupold/exposition of genesis volume 1/chapter xliii.htm

Chapter xix
... Lot, consequently, was not delivered for his own sake but for Abraham's. ... Lot's daughters
stoop to incest, it is true, not because of vile passions, but because ...
//christianbookshelf.org/leupold/exposition of genesis volume 1/chapter xix.htm

The Nations of the South-East
... Ammon and Moab derived their origin from the nephew of Abraham, not from the patriarch ...
It was said that the two peoples were the offspring of incest, and the ...
/.../sayce/early israel and the surrounding nations/chapter iii the nations of.htm

Resources
Why should I not have an abortion? | GotQuestions.org

Does the Bible say anything about a pre-Adamic race? | GotQuestions.org

Who was Cain's wife? Was Cain's wife his sister? | GotQuestions.org

Incest: Dictionary and Thesaurus | Clyx.com

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