Jeremiah 39:3

All the officials of the Babylonian army entered the city and eventually took their places at a gate in the middle of the city, in fulfillment of Jeremiah’s prophecy in Jeremiah 21:4. This Middle Gate was evidently an opening in a wall that separated two parts of Jerusalem. This is the only reference to this gate in the Bible.

The writer mentioned two, three, or four of the Babylonian officials by name: Nergal-sar-ezer, Samgar-nebu, Sar-sekim the Rab-saris or chief official, and perhaps another Nergal-sar-ezer the Rab-mag or chief magi. Nergal-sar-ezer was probably Nebuchadnezzar’s son-in-law who ascended the throne of Babylon in 560 B.C. The writer may have described him with two different titles in this verse, or there may have been two men with the same name. Samgar may be the title of Nergal-sar-ezer, and Nebu may describe a geographical district that he ruled. [Note: Keown, p. 229; Harrison, Jeremiah and . . ., p. 157.]

"In its context Jeremiah 39:3 is a parenthesis describing one of the things that was done soon after the fall of Jerusalem. Its true context is at Jeremiah 39:13, where it is inserted again in the first account of Jeremiah’s release." [Note: Thompson, p. 645.]