The phrase "in the east" represents the people living east of Israel. Isaiah is commanding these people as if they were there with him. But, he is talking to the people in the future after God devastates the earth. Alternate translation: "Therefore everyone from distant lands in the east will glorify Yahweh" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-apostrophe]] and [[rc://en/ta/man/translate/figs-pastforfuture]])
Isaiah is commanding the people who live on the islands in the Mediterranean sea as if they were there with him. But, he is talking to the people in the future after God devastates the earth. Alternate translation: "everyone in the islands will give glory" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-apostrophe]] and [[rc://en/ta/man/translate/figs-pastforfuture]])