“At evening you will know that the Lord has brought you out of the land of Egypt; and in the morning you will see the glory of the Lord,”
God not only created their need, He was also the supply for that need.
And as if to further the point that "today's supply is for today's need," the manna melted by mid-day. When they went to bed at night there was nothing there for the next day that was visible. Only the kind character of the God who had delivered them from Egypt. Over time, they saw the consistent pattern as day followed day and week followed week...and each day there was enough on the ground to feed each person until they were full.
“This is what the Lord has commanded, ‘Gather of it every man as much as he should eat; you shall take an omer apiece according to the number of persons each of you has in his tent.’ ”
The sons of Israel did so, and some gathered much and some little...he who had gathered much had no excess, and he who had gathered little had no lack; every man gathered as much as he should eat.
...They gathered it morning by morning, every man as much as he should eat; but when the sun grew hot, it would melt.
God didn't supply for the week or for the month or for years down the road!
He supplied for TODAY. Just enough.