1 Samuel 17:54
And David took the head of the Philistine, and brought it to Jerusalem; but he put his armour in his tent.
Cross-reference
1 Samuel 17:57
Historical context
In 1 Samuel 17:57, David brings Goliath's head to Saul, continuing the narrative of the trophy from verse 54.
1 Samuel 21:9
Historical context
1 Samuel 21:9 reveals that Goliath's sword, which David took, was later kept at Nob, tying the trophy to David's later need.
1 Samuel 31:9
Contrast
In 1 Samuel 31:9, Philistines cut off Saul's head, a grim reversal of David taking Goliath's head.
2 Samuel 4:7
Parallel
In 2 Samuel 4:7, Ishbosheth's head is brought to David, echoing David's own trophy of Goliath's head.