Exodus 16

“Morning by morning they gathered it, each as much as he could eat; but when the sun grew hot, it melted” (v21).  The “manna” was a fine grain that God provided every day in the wilderness.  Gathering manna taught the Israelites about their relationship with God.  They could not hoard the grain, because it melted or spoiled, and everyone had “just enough.”  The only time they gathered extra was before the Sabbath, so that they could rest on that day but not go hungry.
“It is the bread that the Lord has given you” (v15).  God is not an emergency lifeline; His desire is that we depend on Him daily, recognizing that He is the source of life itself.