This is the name of God that he revealed to his people in the Old Testament. See the translationWord page about Yahweh concerning how to translate this.
This rhetorical question is asked as a rebuke for consulting Baal-Zebub. This may be written as a statement. This is irony because they are definitely aware of the God of Israel. AT: "You fools! You know there is a God in Israel, but you were acting as though you did not know when you sent men to consult Baal-Zebub, the god of Ekron!" (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-irony]])
When King Ahaziah was injured, he was placed in a bed. Yahweh said that he will never become well and be able to get out of the bed. AT: "You will not recover and you will not get up from the bed on which you are lying" (See: [[rc://en/ta/man/translate/figs-explicit]])