1 Samuel 14:48

And he gathered an host, and smote the Amalekites, and delivered Israel out of the hands of them that spoiled them.

Cross-reference

In 1 Samuel 15:3-7, the specific campaign against Amalek is detailed, showing Saul's incomplete obedience.

1 Samuel 15:7 describes the same Amalekite campaign as a specific expedition from Havilah to Shur.

Exodus 17:14 Prophetic fulfillment

In Exodus 17:14, God commands the blotting out of Amalek; Saul's campaign begins that judgment.

Deuteronomy 25:19 Prophetic fulfillment

In Deuteronomy 25:19, the command to blot out Amalek is repeated; Saul's action is the initial execution.

Numbers 24:20 Prophetic fulfillment

Numbers 24:20 prophesies Amalek's utter destruction, which Saul's victory here begins to fulfill.