Joshua said this to show how upset he was that he did not even know what to say. Alternate translation: "I do not know what to say. Israel has turned their backs before their enemies!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
Doing this represents running away from their enemies. Alternate translation: "Israel has run away from their enemies" (See: [[rc://en/ta/man/translate/figs-metonymy]])