Darius being informed of this and having gathered together all his power, made expedition against them, and when he had marched his army up to Babylon he began to besiege them; but they cared nothing about the siege, for the Babylonians used to go up to the battlements of the wall and show contempt of Darius and of his army by gestures and by words; and one of them uttered this saying: “Why, O Persians, do ye remain sitting here, and not depart? For then only shall ye capture us, when mules shall bring forth young.” This was said by one of the Babylonians, not supposing that a mule would ever bring forth young. 152. So when a year and seven months had now passed by, Darius began to be vexed and his whole army with him, not being able to conquer the Babylonians. And yet Darius had used against them every kind of device and every possible means, but not even so could he conquer them, though besides other devices he had attempted it by that also with which Cyrus conquered them; but the Babylonians were terribly on their guard and he was not able to conquer them. 153.