1 Samuel 17:15 in the World English Bible
Now David went back and forth from Saul to feed his father’s sheep at Bethlehem.
Context
14 And David was the youngest: and the three eldest followed Saul.
15 But David went and returned from Saul to feed his father’s sheep at Beth-lehem.
16 And the Philistine drew near morning and evening, and presented himself forty days.