The manna ceased on the next day, after they had eaten of the produce of the land; neither had the children of Israel manna any more; but they ate of the fruit of the land of Canaan that year.
God had guaranteed Joshua’s success only as he kept the Mosaic Law (Joshua 1:7). It was necessary therefore that all the males who had been born in the wilderness and had not undergone circumcision should do so. Circumcision brought the individual male under the blessings of the Abrahamic Covenant (Genesis 17). It was also a prerequisite for partaking in the Passover that God required of all Israelites yearly (Exodus 12). Like the stones just set up, circumcision was also a memorial.