Then said the Lord unto Moses— This was, no doubt, in answer to Moses's application by prayer to the Lord on account of these murmurings; when Jehovah was graciously pleased to promise them bread from heaven, sent down in daily showers, to keep the people in perpetual dependence upon him; and to prove whether, under this daily admonition from heaven, they would walk in his law, or not. We are taught to maintain this dependence upon God by praying to him for our daily bread.
Related Commentaries of Exodus 16:4
Exodus 16:4
4 Then said the LORD unto Moses, Behold, I will rain bread from heaven for you; and the people shall go out and gather a certain rate every day, that I may prove them, whether they will walk in my law, or no.