Contradiction with Exodus 20:13
"Thou shalt not kill." contradicts the directive in 1 Samuel 15:5, which involves preparation for battle against the Amalekites.
Exodus 20:13: Thou shalt not kill.
Contradiction with Matthew 5:44
"But I say unto you, Love your enemies, bless them that curse you" contradicts the act of engaging in war and destruction as described in 1 Samuel 15:5.
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 Romans 12:18
"If it be possible, as much as lieth in you, live peaceably with all men." contradicts the preparations for attack in 1 Samuel 15:5.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.
Contradiction with Proverbs 24:17
"Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth" contradicts the intent and actions leading towards the conflict in 1 Samuel 15:5.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth: