1 Samuel 17:15

15 but David went back and forth from Saul to tend his father’s sheep at Bethlehem.

Read 1 Samuel 17:15 Using Other Translations

But David went and returned from Saul to feed his father's sheep at Bethlehem.
but David went back and forth from Saul to feed his father's sheep at Bethlehem.
but David went back and forth so he could help his father with the sheep in Bethlehem.