The generation of Israel (including Judah) which was wilderness-minded died in that wilderness, except Joshua and Caleb. The generation that entered the promised land had a sense of purpose, and had shed the wilderness.
They brought the mentality of Hagar as their mother (an Egyptian) with them ... an underlying principle in relationship to us found in myriads of picture forms in scripture.
Though the waters of the Jordan rolled all the way back to a city named Adam they did not see it.
This is why Gods firstborn that he called out of Egypt becomes divided as God continues through the process of time to reveal an only begotten whom we are in and one with through the mentality of the mother of us all.