What does 2 Kings 20:14 mean?

Then Isaiah came to Hezekiah and asked, 'What did those men want, and where did they come from?' Hezekiah answered, 'They came from a far-off country—Babylon.' 2 Kings 20:14 - Modern Text Bible

(Isaiah questions Hezekiah about the visitors, prompting Hezekiah to explain their origin.)