Is the husband's statement: "I cannot continue with you... God be with you" considered an irrevocable divorce, and what should the wife do if she wishes to return?

This statement is not explicit in divorce, so divorce does not occur except by the husband's intention. Therefore, ask your husband about his intention. If he did not intend divorce, then nothing results from it. But if he did intend it, then a revocable divorce has occurred, unless he intended more than one divorce, and he can take you back before the 'iddah (waiting period) expires.