Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
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Genesis 2:22-25
Tyndale Open Study Notes (CC BY-SA 4.0).
2:24 Marriage between a man and a woman is not just a human social construct but is rooted in the created order. • a man leaves . . . and is joined: Marriage entails a shift of loyalty from parents to spouse. • the two are united into one: Marriage and its commitments make it the most fundamental covenant relationship observed among humans. Marriage is a powerful image of Israel’s covenant with God (Hos 2:14-23) and of Christ’s relationship to the church (Eph 5:22-32). Marriage is designed as an inseparable, exclusive relationship between a man and a woman. The family unit it creates is the basic building block of human society.
Other Bible passages linked to this one, most cited first.
The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away his wife for every cause? And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female, And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?
So ought men to love their wives as their own bodies. He that loveth his wife loveth himself. For no man ever yet hated his own flesh; but nourisheth and cherisheth it, even as the Lord the church: For we are members of his body, of his flesh, and of his bones.
But from the beginning of the creation God made them male and female. For this cause shall a man leave his father and mother, and cleave to his wife; And they twain shall be one flesh: so then they are no more twain, but one flesh.
For the woman which hath an husband is bound by the law to her husband so long as he liveth; but if the husband be dead, she is loosed from the law of her husband.
Likewise, ye wives, be in subjection to your own husbands; that, if any obey not the word, they also may without the word be won by the conversation of the wives; While they behold your chaste conversation coupled with fear. Whose adorning let it not be that outward adorning of plaiting the hair, and of wearing of gold, or of putting on of apparel;
Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband. Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband. The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife.
Authorship: the book itself or Christian tradition. Approximate dates, as in Carson and Moo, An Introduction to the New Testament, and Longman and Dillard, An Introduction to the Old Testament.