And I will set up one shepherd over them, and he shall feed them, even my servant David; he shall feed them, and he shall be their shepherd. (Ezekiel 34:23)
Commentators have generally taken this prediction to refer to the Messiah (Jer. 23:5, 6; Luke 1:32). Because Israel never accepted the conditions on which these promises could be fulfilled, the application is justified. Jesus, coming in the flesh, and later to come in His glory, is the fulfillment this prediction is now to have.
One shepherd.
Doubtless in contrast with the many rulers who had gone before, and probably also with reference to the two kingdoms of Israel, which were to be reunited.