Contradiction with Genesis 2:24
This verse supports monogamy, whereas Genesis 30:18 involves Leah giving her maid to Jacob as a wife.
Genesis 2:24: Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
Contradiction with Matthew 19:4-6
Jesus reaffirms the idea of monogamous marriage, contrasting the polygamous arrangement depicted in Genesis 30:18.
Matthew 19:4-6: And he answered and said unto them, Have ye not read, that he which made [them] at the beginning made them male and female,
Contradiction with 1 Timothy 3:2
An overseer must be the husband of one wife, which contradicts the polygamous context seen in Genesis 30:18.
1 Timothy 3:2: A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behaviour, given to hospitality, apt to teach; [of good...: or, modest]
Contradiction with Malachi 2:15
Emphasizes faithfulness to the wife of one's youth, which contrasts Leah's justification for using her maid in Genesis 30:18.
Malachi 2:15: And did not he make one? Yet had he the residue of the spirit. And wherefore one? That he might seek a godly seed. Therefore take heed to your spirit, and let none deal treacherously against the wife of his youth. [residue: or, excellency] [godly...: Heb. seed of God] [treacherously: or, unfaithfully]
Contradiction with Deuteronomy 17:17
Warns against multiplying wives, conflicting with the practice involved in Genesis 30:18.
Deuteronomy 17:17: Neither shall he multiply wives to himself, that his heart turn not away: neither shall he greatly multiply to himself silver and gold.
Contradiction with 1 Corinthians 7:2
Advises each man to have his own wife to avoid sexual immorality, which contrasts with the multiple wives context of Genesis 30:18.
1 Corinthians 7:2: Nevertheless, [to avoid] fornication, let every man have his own wife, and let every woman have her own husband.
Contradiction with Ephesians 5:31
Reinforces the one-flesh union between one man and one woman, contrary to the polygamous implications in Genesis 30:18.
Ephesians 5:31: For this cause shall a man leave his father and mother, and shall be joined unto his wife, and they two shall be one flesh.
Contradiction with Proverbs 5:18-19
Advocates rejoicing in the wife of one's youth, which contradicts the situation in which Leah gave her maid to Jacob in Genesis 30:18.
Proverbs 5:18-19: Let thy fountain be blessed: and rejoice with the wife of thy youth.
Paradox #1
Genesis 30:18 involves Leah giving praise for being able to bear a son due to a transaction involving mandrakes. The contradiction or inconsistency could be seen in how the verse focuses on human bargaining and manipulation—using the mandrakes to gain favor—which might conflict with the idea that love and childbirth should come naturally or be a divine gift, rather than the result of a deal.