תּלמוד אויף דברים 3:4

And they raised a contradiction with the following: R. Ishmael son of R. Yose said: Were these all? Has it not already been said, “Sixty cities, all the region of Argob”, And it is written, “All these were fortified cities with high walls” (Deuteronomy 3:4-5)? Why then did the Sages list these? Because when the exiles returned, they found these [still walled] and sanctified them.