Charles Ellicott Commentary Jeremiah 51:46

"And let not your heart faint, neither fear ye for the tidings that shall be heard in the land; for tidings shall come one year, and after that in another year [shall come] tidings, and violence in the land, ruler against ruler." — Jeremiah 51:46 (ASV)

And lest your heart faint ... —Better, Let not your heart faint; fear you not ...

For the rumour that shall be heard in the land. —It is in the nature of such events that the final catastrophe of the city would be preceded by a period of uncertainty and suspense. People would hear of the union of the Medes and Persians under Cyrus, of the murder of Evil-Merodach by Neriglissar, of the death of Neriglissar in fighting against the enemy (B.C. 555). The child-king, whom Berosus calls Laborosoarchod, was dethroned by his nobles after a few months, and was succeeded by the father of the Belshazzar of Daniel 5:1, the Labynetus of Herodotus, whose true name was Nabo-nahid. The whole empire was in the throes of dissolution. The words present a singular parallel to those which speak of wars and rumours of wars in Matthew 24:6-7; Luke 21:9.