The iniquity of Peor, i.e. of our worshipping of BaalPeer, Num 25. From which we are not cleansed until this day; for though God had pardoned it, as to the national punishment of it, Numbers 25:11, yet they were not yet thoroughly purged from it; partly because the shame and blot of that filthy and odious practice was not yet wiped of; and partly because some of that corrupt leaven still remained among them, and though it smothered for a time, yet was ready to break forth upon all occasions. See Joshua 24:23. And God also took notice of these idolatrous inclinations in particular persons, and found out ways to punish them one time or other.
Related Commentaries of Joshua 22:17
Joshua 22:17
17 Is the iniquity of Peor too little for us, from which we are not cleansed until this day, although there was a plague in the congregation of the LORD,