Bread, i.e. manna, which shall serve them instead of bread, Numbers 11:8, and was a more delicate and pleasant kind of bread, called therefore the bread of angels, Psalms 78:24,25. From heaven; the air, oft called heaven, in which manna is produced. Every day, Heb. the thing, i.e. the provision of a day in his day, i.e. every day, as much as was sufficient for a man's sustenance that day. That I may prove them; either,
1. Whether by my giving them such miraculous and excellent provision they will be won to love and obey me. Or,
2. Whether by raining it down upon them for several days together they will learn to trust me for the following days, and therefore gather no more than that day required.