And Moses said, Let no man. Moses here recounts that, when he had commanded them all not to take more than enough for their daily food, and to gather a double portion the day before the Sabbath, some were disobedient on both points. As to the former, since God would supply their food to them just as the breast is given to babes, it was a sign of perverse unbelief that they would not depend on God's providence, but sought for a provision which would last them many days. It was also a proof of their obstinacy that they would give credit to no warnings until they were convinced by experience that they laid up in their houses nothing' but a mass of corruption; for they were not induced to cease from their insatiable greediness till they had received their just punishment. Now, although the case of the manna and the food of our ordinary nourishment is not; altogether similar, yet the comparison holds to a certain extent, for it is so far lawful to keep our corn and wine laid up in granaries and cellars, as that all should still ask truly their daily bread of God. And this will be, if the rich do not greedily swallow up whatsoever they can get together; if they do not avariciously scrape up here and there; if they do not gorge themselves upon the hunger of the poor; if they do not, as far as in them lies, withhold the blessing of God; in a word, if they do not immoderately accumulate large possessions, but: are liberal out of their present abundance, are not too anxious as to the future, and are not troubled, if needs be, that their wealth should suffer diminution; nay, if they are ready to endure poverty, and glory not in their abundance, but repose upon the paternal bounty of God. And surely we often see that what misers collect by theft, rapine, fraud, cruelty, trickery, or meanness, is often turned into corruption. When he adds that, after they saw that their intemperate ardor profited them nothing, they submitted to the command, he implies that their obedience was not voluntary, but extorted from them, for fools are never wise except after adversity. The melting of the manna when the sun waxed hot was a stimulus to correct their idleness or laziness; for, if the manna had remained entire during the whole day, they would not have been so intent upon their duty. Wherefore, by giving them only a short time for its collection, God urged them to diligence.

Let no man leave of it till the morning - For God would have them to take no thought for the morrow, and constantly to depend on him for their dally bread. And is not that petition in our Lord's prayer founded on this very circumstance, Give us day by day our daily bread?

And Moses said unto them,.... At the same time he gave the direction to them about gathering it, and measuring out to every man an omer:
let no man leave of it until the morning; not that every man was bound to eat up the quantity distributed to him; he might give what he could not eat to those that could eat more, if there were any such; or he might give it to his cattle, or cast it away, but he was not to reserve it until the next day for his use; which was to teach him that God would bestow this benefit and blessing on him daily, and he might expect it, whose mercies are new every morning; and to instruct him to live every day upon the providence of God for his daily food; as indeed every man ought to do so, let his circumstances be ever so affluent; and, in a more spiritual and evangelic sense, it teaches believers to live continually every day by faith on Christ, and to say day by day, Lord, evermore give us this bread, John 6:34.

In the second place, Moses commanded them, that no one was to leave any of what had been gathered till the next morning. Some of them disobeyed, but what was left went into worms (תּולעים ירם literally rose into worms) and stank. Israel was to take no care for the morrow (Matthew 6:34), but to enjoy the daily bread received from God in obedience to the giver. The gathering was to take place in the morning (Exodus 16:21); for when the sun shone brightly, it melted away.

Let no man leave 'till morning - But let them learn to go to bed and sleep quietly, though they had not a bit of bread in their tent, nor in all their camp, trusting God with the following day to bring them their daily bread. Never was there such a market of provisions as this, where so many hundred thousand men were daily furnished without money, and without price: never was there such an open house kept as God kept in the wilderness for 40 years together, nor such free and plentiful entertainment given. And the same wisdom, power and goodness that now brought food daily out of the clouds, doth in the constant course of nature bring food yearly out of the earth, and gives us all things richly to enjoy.