This word is used here to mark a return to the main story. Here the narrator tells what Yahweh had said to Jeremiah after Nebuchadnezzar gave the orders about Jeremiah ([Jeremiah 39:12-14](./12.md)). (See: [[rc://en/ta/man/jit/writing-background]] and [[rc://en/ta/man/jit/figs-events]])
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](../01/04.md). 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]])
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](../32/02.md).