Moses
Exodus 16:24ESV·traditional attribution

So they laid it aside till the morning, as Moses commanded them, and it did not stink, and there were no worms in it.

Matthew Henry Presbyterian @wholebiblehenry

We have here, 1. A plain intimation of the observing of a seventh day sabbath, not only before the giving of the law upon Mount Sinai, but before the bringing of Israel out of Egypt, and therefore, from the beginning, Gen 2:3.

Commenting on Exodus 16:22-31

John Gill Reformed Baptist @doctorgill

And Moses said, eat that today,.... That is, he said this on the seventh day in the morning, and bid them eat of it whether baked or seethed, or as it was, or just as they pleased; however, they had liberty to eat of it, and indeed they had no other, because none fell on this day: for today is a sabbath unto the Lord...

Keil & Delitzsch Lutheran @keilanddelitzsch

Exo 16:22-26 Moreover, God bestowed His gift in such a manner, that the Sabbath was sanctified by it, and the way was thereby opened for its sanctification by the law. On the sixth day of the week the quantity yielded was twice as much, viz., two omers for one (one person).

Commenting on Exodus 16:22-26