Daniel 2:49

Daniel requested of the king, and he set Shadrach, Meshach, and Abed-nego over the affairs of the province of Babylon - He wished his three companions promoted, who had shared his anxieties, and helped him by their prayers. They all had places of trust, in which they could do much good, and prevent much evil.

Daniel sat in the gate of the king - That is, was the chief officer in the palace; and the greatest confidant and counselor of the king. But whatever his influence and that of his friends was, it extended only over the province of Babylon; not through the empire.