Yet on the seventh day some of the people went out to gather, but they did not find anything.
27. And it came to pass. This is the second transgression, that by going out on the seventh day they trenched upon its religious observance; and this monstrous greediness arose from their not believing to be true what we have just heard Moses saying, for he had plainly declared to them that they would not find the manna.
The sabbath was no new thing when God gave the double portion on the sixth day; the people grasped His meaning at once, which proves they knew of it before Egypt or Sinai. Setting apart one day in seven for holy rest is the most ancient of all positive laws, the good old way. God will never let a man lose by serving Him.
AI summary
Commenting on Exodus 16:22-31
And the Lord said unto Moses,.... Who had seen and taken notice of what those men had done, who went out into the field to seek for manna on the seventh day, and was displeased with it, and therefore spoke to Moses out of the cloud: how long refuse ye to keep my commandments and my laws?