At that time Yahweh said to Joshua, Make you flint knives, and circumcise again the children of Israel the second time.
Circumcise again the children of Israel the second time. — This certainly does not mean that they should repeat circumcision on those who had already received it. This would have been as absurd as impracticable. But the command implies that they were to renew the observance of a rite which had been neglected in their travels in the desert: this is sufficiently evident from the following verses.