1 Samuel 18:2

Saul took him on that [very] day and did not allow him to return to his father's house.

but David went {back and forth} from Saul to feed the sheep of his father in Bethlehem.

So David came to Saul and {entered his service}. He loved him greatly and {he became Saul's armor bearer}.

Treasury of Scripture Knowledge

And Saul took him that day, and would let him go no more home to his father's house.

So David came to Saul and {entered his service}. He loved him greatly and {he became Saul's armor bearer}.

but David went {back and forth} from Saul to feed the sheep of his father in Bethlehem.