Contradiction with Matthew 5:44
This verse teaches to love your enemies and bless those who curse you, which contrasts with the contempt expressed in 1 Samuel 17:43.
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 Proverbs 15:1
Advocates for a soft answer to turn away wrath, opposing the aggressive tone in 1 Samuel 17:43.
Proverbs 15:1: A soft answer turneth away wrath: but grievous words stir up anger.
Contradiction with 1 Peter 3:9
Instructs not to repay evil with evil or insult with insult, which contradicts the response seen in 1 Samuel 17:43.
1 Peter 3:9: Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.
Contradiction with Romans 12:14
Encourages believers to bless rather than curse their persecutors, in contrast to the denouncement in 1 Samuel 17:43.
Romans 12:14: Bless them which persecute you: bless, and curse not.
Contradiction with Proverbs 25:21-22
Advises feeding your enemy if he is hungry, an opposite approach to the hostility in 1 Samuel 17:43.
Proverbs 25:21-22: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with Luke 6:27
Commands to love your enemies, conflicting with the disdainful attitude in 1 Samuel 17:43.
Luke 6:27: But I say unto you which hear, Love your enemies, do good to them which hate you,
Contradiction with Exodus 23:4-5
Instructs kindness towards your enemy's property, contrasting the hostility in 1 Samuel 17:43.
Exodus 23:4-5: If thou meet thine enemy's ox or his ass going astray, thou shalt surely bring it back to him again.