Jamieson, Fausset & Brown, on Jer 27:3

“And thou shalt send them to the of Edom, and to the king of Moab, and to the king of the children of Ammon, and to the king of Tyre, and to the king of Sidon: by the hand of the messengers that are come to Jerusalem to Sedecias the king of Juda.”

“And send them to the king of Edom, &c.--Appropriate symbol, as these ambassadors had come to Jerusalem to consult as to shaking off the yoke of Nebuchadnezzar. According to PHERECYDES in CLEMENT OF ALEXANDRIA [Miscellanies, 567], Idanthura, king of the Scythians, intimated to Darius, who had crossed the Danube, that he would lead an army against him, by sending him, instead of a letter, a mouse, a frog, a bird, an arrow, and a plough. The task assigned to Jeremiah required great faith, as it was sure to provoke alike his own countrymen and the foreign ambassadors and their kings, by a seeming insult, at the very time that all were full of confident hopes grounded on the confederacy.”

Imported from an open dataset — not yet checked against the printed edition.