Contradiction with Exodus 20:14
This verse commands not to commit adultery, which may be seen as being disregarded in the close proximity of Ruth and Boaz overnight.
Exodus 20:14: Thou shalt not commit adultery.
Contradiction with 1 Thessalonians 5:22
Advises to abstain from all appearance of evil, which could be interpreted as compromised given the private meeting of Ruth and Boaz.
1 Thessalonians 5:22: Abstain from all appearance of evil.
Contradiction with Proverbs 6:27-29
Warns against taking steps that could lead to being burned by sin, potentially contradicting the overnight encounter of Ruth and Boaz.
Proverbs 6:27-29: Can a man take fire in his bosom, and his clothes not be burned?
Contradiction with Hebrews 13:4
Upholds the sanctity of marriage and warns against sexual immorality, which some might argue is at risk in the situation described.
Hebrews 13:4: Marriage [is] honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.