1 Samuel 17:2
And Saul and the men of Israel were gathered together, and pitched by the valley of Elah, and set the battle in array against the Philistines.
Torrey's Topical Textbook—AKJV

1 Samuel 21:9
And the priest said, The sword of Goliath the Philistine, whom you slew in the valley of Elah, behold, it is here wrapped in a cloth behind the ephod: if you will take that, take it: for there is no other save that here. And David said, There is none like that; give it me.
Torrey's Topical Textbook—AKJV