en_tn_lite_do_not_use/jer/39/15.md

General Information:

This story happened before the events in the first part of the chapter.

Now

This word is used here to mark a return to the story line, as the narrator tells what Yahweh had said to Jeremiah after Nebuchadnezzar gave the orders about Jeremiah (Jeremiah 39:12-14). (See: rc://en/ta/man/jit/writing-background and rc://en/ta/man/jit/figs-events)

the word of Yahweh came to Jeremiah while he was ... guard, saying,

The idiom "the word of Yahweh came to" is used to introduce a special message from God. See how you translated a similar phrase in Jeremiah 1:4. Alternate translation: "Yahweh gave a message to Jeremiah while he was ... guard. He said," or "while Jeremiah was ... guard, Yahweh spoke this message to him:" (See: rc://en/ta/man/jit/figs-idiom)

the courtyard of the guard

This was an open area attached to the king's palace that was surrounded by buildings and in which they kept prisoners. See how you translated this in Jeremiah 32:2.