You provided bread from heaven for them in their time of hunger, and you brought forth water from the rock for them in their time of thirst. You told them to enter in order to possess the land that you had sworn to give them.
“I have heard the murmurings of the Israelites. Tell them, ‘During the evening you will eat meat, and in the morning you will be satisfied with bread, so that you may know that I am the Lord your God.’”
Now the Israelites ate manna forty years, until they came to a land that was inhabited; they ate manna until they came to the border of the land of Canaan.
Moreover, you have not brought us into a land that flows with milk and honey, nor given us an inheritance of fields and vineyards. Do you think you can blind these men? We will not come up.”
“Take the staff and assemble the community, you and Aaron your brother, and then speak to the rock before their eyes. It will pour forth its water, and you will bring water out of the rock for them, and so you will give the community and their beasts water to drink.”
So he humbled you by making you hungry and then feeding you with unfamiliar manna. He did this to teach you that humankind cannot live by bread alone, but also by everything that comes from the Lord’s mouth.