This refers to him sending a messenger to the king. Alternate translation: "until you send a messenger to me to inform me" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here the king implies he is to receive a message informing him about what is happening in Jerusalem. Alternate translation: "to tell me what is happening in Jerusalem" (See: [[rc://en/ta/man/translate/figs-explicit]])