For all the people who came out were circumcised; but all the people who were born in the wilderness by the way as they came forth out of Egypt, they had not circumcised.
With the completion of the circumcision, the people could celebrate the Passover (something that an uncircumcised person was not allowed to do; see Exodus 12:47-49). The journey from Egypt to Canaan was now officially over, and therefore the miraculous daily supply of manna ceased (10-12; cf. Exodus 16:35).