Exodus 17 is where we hear about Moses striking a rock and getting water. In his first sermon on science and faith back in 2014, Father Kevin preached about this part of scripture. I put a little bit below, but will do a post on his sermons at a later date.
Exodus 16: Second crisis for the Israelites: lack of food. God decides to rain bread on them, but he decides to test them. He tells the people that they need to gather as much food as they need for each day, but no more. Then on the 6th day, they will take enough for that day and the sabbath. At twilight they eat meat, and the morning they gather their bread for the day. Some people try to hoard some bread on the first day and it goes bad. Some also try to gather food on the sabbath. God gets angry because some people fail to listen to him. They seem to at least learn for now. We also learn that they are in the wilderness for 40 years.