Contradiction with Matthew 5:44
This verse instructs to love enemies, whereas 1 Samuel 20:9 involves a potential harm to David, conflicting with the act of loving enemies.
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 Exodus 20:16
Advises not to bear false witness, contrasting the deception in 1 Samuel 20:9, where Jonathan is willing to deceive Saul for David’s safety.
Exodus 20:16: Thou shalt not bear false witness against thy neighbour.
Contradiction with Romans 13:1-2
Teaches submission to authorities, but 1 Samuel 20:9 shows Jonathan ready to defy his father, the king.
Romans 13:1-2: Let every soul be subject unto the higher powers. For there is no power but of God: the powers that be are ordained of God. [ordained: or, ordered]