They laid it up. The great bulk of the Israelites obeyed Moses, and laid by a portion (half?) of the manna gathered on the sixth day. On the morning of the seventh, this was found to be perfectly good, and not to have "bred worms" in the night. Either this was a miracle, or the corruption previously noticed (Exodus 16:20) was miraculous.
And Moses said. The Sabbath being come, Moses explained fully the reason for the order which he had given, and generalized it. God required the Sabbath to be "a day of holy rest"—no manna would fall on it, and therefore none could be gathered—the produce of the sixth day's gathering would be found to suffice both for the sixth day and the seventh.