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 1:13](../01/13.md). Alternate translation: "Yahweh gave a message to Jeremiah a second time, while Jeremiah was ... guard. He said, 'Yahweh" or "While Jeremiah was ... guard, Yahweh spoke this second message to Jeremiah: 'Yahweh" (See: [[rc://en/ta/man/translate/figs-idiom]])
It is not clear why Jeremiah is referring to himself by name here. There is no need to translate using first person. (See: [[rc://en/ta/man/translate/figs-123person]])
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).