Histories

Further, as the Babylonians, fearing for their food, had strangled their own women, as I described above, Darius provided wives to give them a posterity by appointing that each of the neighboring nations should send a certain number of women to Babylon [44.4,32.55] (deserted settlement), Babil, Iraq, AsiaBabylon; the sum of the women thus collected was fifty thousand: these were the mothers of those who now inhabit the city.

There never was in Darius' judgment any Persian before or after who did better service than Zopyrus, except Cyrus, with whom no Persian could compare himself. Many times Darius is said to have declared that he would rather Zopyrus were free of disfigurement than have twenty Babylons on top of the one he had.