Contradiction with Deuteronomy 17:14-15
This verse instructs Israel on how to appoint a king, which contrasts with 1 Samuel 8:10 where Samuel warns against having a king.
Deuteronomy 17:14-15: When thou art come unto the land which the LORD thy God giveth thee, and shalt possess it, and shalt dwell therein, and shalt say, I will set a king over me, like as all the nations that [are] about me;
Contradiction with Judges 21:25
This verse supports everyone doing what is right in their own eyes without centralized leadership, contradicting the notion of establishing a king as warned in 1 Samuel 8:10.
Judges 21:25: In those days [there was] no king in Israel: every man did [that which was] right in his own eyes.
Contradiction with Hosea 13:11
This verse states that God gave them a king in His anger, which contradicts the warning in 1 Samuel 8:10 about the negative implications of having a king.
Hosea 13:11: I gave thee a king in mine anger, and took [him] away in my wrath.
Contradiction with 1 Samuel 12:17-19
In these verses, the people realize their error in demanding a king, which contradicts 1 Samuel 8:10 where Samuel warns them beforehand.
1 Samuel 12:17-19: [Is it] not wheat harvest to day? I will call unto the LORD, and he shall send thunder and rain; that ye may perceive and see that your wickedness [is] great, which ye have done in the sight of the LORD, in asking you a king.
Contradiction with 1 Samuel 9:16
God explicitly tells Samuel to anoint a king for Israel, which contradicts the warning given in 1 Samuel 8:10.
1 Samuel 9:16: To morrow about this time I will send thee a man out of the land of Benjamin, and thou shalt anoint him [to be] captain over my people Israel, that he may save my people out of the hand of the Philistines: for I have looked upon my people, because their cry is come unto me.