And Joshua burnt Ai,.... The whole city, fire being only set before to a few houses, to make a smoke as a signal; he did with it as he had done with Jericho, for so he was ordered, Jos 8:2, and made it an heap for ever; that is, for a long time, for it appears to have been rebuilt, and to have been inhabited by the Jews, after their return from their Babylonish captivity, Neh 11:31, even a desolation unto this day; to the time of the writing of this book; and by what has been just observed, it appears that Ezra could not be the writer of it, since this city was inhabited in his time.