Contradiction with Exodus 20:13
Contradicts 2 Samuel 14:6 by stating "Thou shalt not kill," opposing the act of one brother killing another.
Exodus 20:13: Thou shalt not kill.
Contradiction with Romans 12:19
Contradicts by teaching "avenge not yourselves, but rather give place unto wrath," against the plea for vengeance in 2 Samuel 14:6.
Romans 12:19: Dearly beloved, avenge not yourselves, but [rather] give place unto wrath: for it is written, Vengeance [is] mine; I will repay, saith the Lord.
Contradiction with Matthew 5:44
Contradicts by instructing to "love your enemies" rather than seeking punishment for them, which is implied in the request for justice in 2 Samuel 14:6.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Genesis 9:6
Contradicts by declaring "Whoso sheddeth man's blood, by man shall his blood be shed," enforcing capital punishment, unlike the woman's plea for clemency in 2 Samuel 14:6.
Genesis 9:6: Whoso sheddeth man's blood, by man shall his blood be shed: for in the image of God made he man.
Contradiction with Leviticus 19:17
Contradicts through the command "Thou shalt not hate thy brother in thine heart," opposing the familial strife depicted in 2 Samuel 14:6.
Leviticus 19:17: Thou shalt not hate thy brother in thine heart: thou shalt in any wise rebuke thy neighbour, and not suffer sin upon him. [and...: or, that thou bear not sin for him]
Paradox #1
The moral conflict in 2 Samuel 14:6 could be seen as a struggle between justice and mercy. The verse is part of a story where a woman pleads with King David for mercy over strict justice. This raises the question of whether it's more important to follow the law exactly or to show compassion and forgiveness, even when someone has done wrong.