Moses
Exodus 16:19ESV·traditional attribution

And Moses said to them, “Let no one leave any of it over till the morning.”

John Calvin Reformed @genevareformer

19. 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.

Matthew Henry Presbyterian @wholebiblehenry

Now they begin to be provided for by the immediate hand of God. I. He makes them a feast, at night, of delicate fowl, feathered fowl (Psa 78:27), therefore not locusts, as some think; quails, or pheasants, or some wild fowl, came up, and covered the camp, so tame that they might take up as many of them as they pleased.

Commenting on Exodus 16:13-21

John Gill Reformed Baptist @doctorgill

Notwithstanding they hearkened not unto Moses,.... That is, not all of them, some of them did, and perhaps the far greater part of them: but some of them left it until the morning; out of distrust, for fear they should have none the next day; being men of little faith, that could not trust God for a supply for the morrow; the Targum of Jonathan...