Exodus 16:27

And it came to pass
Perhaps the next seventh day following:

[that] there went out [some] of the people for to gather;
to gather manna, as on other days; which they did not through want of provision or a greedy appetite, for they had bread every day, and on that day to the full, but to gratify their curiosity, or to see whether the words of Moses stood, as Aben Ezra expresses it, that is, whether what he said was true, or came to pass, that there should be none, and they should not be able to find any on that day, and so it was:

and they found none;
no manna; in the places where they used to find it in plenty on other days.