Joshua 6:23

23.And the young men that were spies went in, etc God, doubtless, wished those to be safe, whose minds he thus inclined to embrace deliverance. Had it been otherwise, they would have rejected it not less proudly, and with no less scorn than the two sons-in-law of Lot. But a still better provision is made for them, when, by being placed without the camp, they receive a strict injunction to abandon their former course of life. (67) For had they been immediately admitted and allowed to mix indiscriminately with the people, the thought of their impurity might never, perhaps, have occurred to them, and they might thus have continued to indulge in it. Now when they are placed apart, that they may not, by their infection, taint the flock, they are impressed with a feeling of shame, which may urge them to serious conversion.

It cannot be meant that they were thus set apart for safety, lest any one in the crowd might have risen up violently against them: for they would have been received by all with the greatest favor and gladness, whereas they might have been attacked in a solitary place more easily, and even with impunity. Their impurity, therefore, was brought visibly before them, that they might not while polluted come rashly forward into the holy meeting, but rather might be accustomed by this rudimentary training to change their mode of life. For it is added shortly after, that they dwelt in the midst of the people; in other words, having been purged from their defilement’s, they began to be regarded in the very same light as if they had originally belonged to the race of Abraham. In short, the meaning is, that after they had made a confession of their previous impurity, they were admitted indiscriminately along with others. By this admission, Rahab gained one of the noblest fruits of her faith.