1 Samuel 15:7
And Saul smote the Amalekites from Havilah until thou comest to Shur, that is over against Egypt.
Cross-reference
1 Samuel 14:48 summarizes Saul's victory over Amalek—the same enemy he defeats again in this campaign.
1 Samuel 27:8 also mentions Shur and the Amalekites, showing the same region was repeatedly contested.
In 1 Sam 27:9, David also attacks the Amalekites, mirroring Saul's earlier campaign against the same enemy.
1 Sam 30:1 records the Amalekites raiding Ziklag, showing the ongoing conflict with the people Saul attacked.
Genesis 25:18 describes Ishmael's territory from Havilah to Shur, exactly the same geographical range as Saul's campaign.
Exodus 15:22 describes Israel traveling through the wilderness of Shur, the same area Saul fought the Amalekites.
Exodus 17:14 records God's decree to blot out Amalek, which Saul was executing in his campaign.
1 Chr 4:43 describes the Simeonites finishing off the remnant of Amalekites, continuing the destruction Saul began.
Genesis 16:7 mentions Shur as the location where the angel found Hagar, the same region Saul campaigned.
Genesis 20:1 places Shur as a landmark in Abraham's travels, the same region Saul later attacked.