Contradiction with 1 Samuel 15:3
This verse instructs Saul to "smite Amalek, and utterly destroy all that they have," which involves engaging in battle, contrasting with Saul's return from pursuing the Philistines in 1 Samuel 14:46.
1 Samuel 15:3: Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.
Contradiction with 1 Samuel 13:13-14
Samuel tells Saul his kingdom will not continue because he did not keep God's command, which contrasts with Saul seemingly taking a less aggressive approach in 1 Samuel 14:46 by not pressing the attack against the Philistines.
1 Samuel 13:13-14: And Samuel said to Saul, Thou hast done foolishly: thou hast not kept the commandment of the LORD thy God, which he commanded thee: for now would the LORD have established thy kingdom upon Israel for ever.