Manna is supplied in the wilderness, but not in the Promised Land

And the children of Israel did eat manna forty years, until they came to a land inhabited; they did eat manna, until they came unto the borders of the land of Canaan. (Exodus 16:35 KJV)

Manna is supplied in the wilderness, but not in the Promised Land. Miracles occur so that we know that God is God. Once we know, the miracles stopped.

Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed are they that have not seen, and yet have believed. (John 20:29 KJV)