Matthew Poole and continuators on Jeremiah 46:17

17 They did cry there, Pharaoh king of Egypt is but a noise , he hath passed the time appointed .

That is the Ethiopians and Lubims that should come to help the king of Egypt should cry, or the Caldeans, or the Egyptians themselves should cry Pharaoh is but a noise, that is, hath made a great noise but it cometh to nothing, others make the sense Pharaoh is a man of noise, or tumult, that hath made a great deal of disturbance to himself and us.

That is say the most he hath passed the time himself fixed whereat he would come, and fight the Caldeans. But these words compared with the next verse incline others to think, that either Pharaohs Souldiers, or his Allies are here brought in mocking at Pharaoh, promising himself that the King of Babylon would not come, and laughing at Ieremiah's Prophesie, saying, the time appointed was past, that is the time of his coming mentioned by Ieremiah was past. Ieremiah foretells that Pharaohs Army and Confederates would see reason to cry out, Pharaoh, in saying so, was but a noise.