The divine prohibition in this portion of our chapter refers to near relations and rests simply on the divine will and authority: “I am Jehovah.” Marriage was not, save at the beginning, to unite “one's own flesh,” naturally united or near already.
“6 None of you shall approach to all (or, any) flesh of his flesh to uncover nakedness: I [am] Jehovah. 7 The nakedness of thy father, and the nakedness of thy mother, shalt thou not uncover (she [is] thy mother); thou shalt not uncover her nakedness. 8 The nakedness of thy father's wife shalt thou not uncover: it [is] thy father's nakedness. 9 The nakedness of thy sister, daughter of thy father, or daughter of thy mother, born at home or born abroad, their nakedness thou shalt not uncover. 10 The nakedness of thy son's daughter or of thy daughter's daughter, their nakedness thou shalt not uncover; for theirs [is] thy nakedness. 11 The nakedness of thy father's wife's daughter, begotten of thy father (she [is] thy sister), thou shalt not uncover her nakedness. 12 The nakedness of thy father's sister shalt thou not uncover; she [is] thy father's own flesh. 13 The nakedness of thy mother's sister shalt thou not uncover; for she [is] thy mother's own flesh. 14 The nakedness of thy father's brother shalt thou not uncover; thou shalt not approach his wife: she [is] thine aunt. 15 The nakedness of thy daughter-in-law shalt thou not uncover (she [is] thy son's wife); thou shalt not uncover her nakedness. 16 The nakedness of thy brother's wife shalt thou not uncover; it [is] thy brother's nakedness. 17 The nakedness of a woman and her daughter shalt thou not uncover; thou shalt not take her son's daughter, nor her daughter's daughter, to uncover her nakedness (they [are] her own flesh): it [is] wickedness. 18 And thou shalt not take a wife to her sister, to vex [her] (or, be a rival), to uncover her nakedness, beside her during her life” (vers. 6-18).
The opening is singularly emphatic, “Man, man, &c.” This the Septuagint follows closely. Man's attention is called for. Marriage is only honorable where God's will is observed. Heb. 13:44Marriage is honorable in all, and the bed undefiled: but whoremongers and adulterers God will judge. (Hebrews 13:4) in no way sanctions or sanctifies a forbidden union. The true rendering is, Let marriage be honorable (not “among all” as the Revisers say, but) “in all things,” and the bed be undefiled. The construction is alike before and after. It is an injunction, not an affirmation as in the A.V. with Wiclif, Cranmer, and the Geneva translators. The Rhemish is an ungrammatical evasion, meant to correspond with the Vulgate, which would seem to take the Greek like the Peschito, Wiclif, &c. Tyndale alone was right. Against unions or licenses, such as are here indicated, Jehovah sets His face. His name from beginning to end of the chapter is the solemn warrant against them all. If an Israelite allowed passion to carry him away, it was rebellion against Jehovah and at his own peril.
But in these near relationships marriage was unnatural and dishonorable in the measure of the nearness. And that intercourse which was proper to the married tie, forbidden in every case outside it, was here sinful and shameful in the highest degree, whether in the superior place of father or mother, and the nearest on either side, or in the equal one of sister howsoever born, or in the inferior one of daughter-in-law. And who would be bold enough to deny that the corresponding ones, not here specified, are not really implied? It is the man who is here prohibited: surely the woman is so no less. Further, the prohibition goes beyond blood-relations and extends in like degree to those by marriage connection. Of great moment it was to cultivate the warmest affection between all that stood together in near kin or connection. But still more was it essential that their mutual love should be ordered in all purity.
There was a marked exception requisite to keep up tribal inheritance in Israel, which though existing elsewhere applied to no other people as to them, still less to a Christian; a Levirate or brother-in-law marriage. It was when a man died childless, and his brother or next of kin was called to raise up seed to the deceased, the aim being to bind up the family line and the inheritance; so much this, that if the nearer kinsman refused, the widow was entitled publicly to loose his shoe and spit in his face.
Verse 17 shows that the prohibition goes beyond this to the incongruous and unnatural intercourse with a woman and her daughter, or her son's daughter or her daughter's daughter, though all strangers to him. And verse 18 forbids an Israelite to have two sisters together, for the reason assigned. Christianity goes to the root of the matter by recalling, as our Lord did, to what was at the beginning when God made one man and one woman.