John Chrysostom
David was in his youth, and due to his age, resided under the care of his father.
David went, and returned from Saul, to feed his father's flock at Bethlehem.
וְדָוִ֛ד הֹלֵ֥ךְ וָשָׁ֖ב מֵעַ֣ל שָׁא֑וּל לִרְע֛וֹת אֶת־צֹ֥אן אָבִ֖יו בֵּֽית־לָֽחֶם׃
One Church Father comments on this verse
David was in his youth, and due to his age, resided under the care of his father.
Passages read together with this verse.