Matthew Poole and continuators on Jeremiah 34:7

7 When the king of Babylons army fought against Jerusalem, an against all the cities of Judah that were left, against Lachish, and against Azekah; for these defenced cities remained of the cities of Judah .

The Prophet was not afraid to go and do the message God had intrusted him with to the King, upon which he was imprisoned as we read before chap. 32.3. the time it should seem was after that the King of Babylon had invaded the Country, and taken the greatest part of it; onely three fortified places remained, which he was besieging. viz. Ierusalem, which was the chief City of that Countrey, and Lachish of the conquest of which we read, Ios. 10.31. disposed of to the Tribe of Iudah. Ioh. 15.39. and Azekah, which was a City of Iudah, of which we read in the same chapters.