Exodus 16:22

“And it came to pass, that on the sixth day, etc.] Of the week, or from the first raining of the manna, which was the same: they gathered twice as much bread; as they had used to do on other days, a greater quantity falling, and which was more easily taken up: two omers for one man; or, “instead of one” f526 of one omer; so it turned out when they came to measure what they had gathered; otherwise they had no intention in gathering it, but lying in a great quantity, they gathered as much as they could, or could well carry, and upon measuring it so it proved; for it does not appear that Moses had as yet acquainted them what was to be, or would be gathered on this day; nor had he any orders so…”

“Twice as much bread - See Exodus 16:5. From this passage and from Exodus 16:5 it is inferred that the seventh day was previously known to the people as a day separate from all others, and if so, it must have been observed as an ancient and primeval institution. return to 'Top of Page'”

“What the substance called manna was, is utterly unknown, but, from the circumstances in the text, it is evident that it was not a natural production, but was miraculously sent by Jehovah. These the learned Abarbinel, a most judicious Jewish interpreter, has thus enumerated: \- The natural manna was never found in the desert where this fell where the common manna does fall; \- It is only in the spring time, in March and April, whereas this fell throughout all the months in the year; \- The ordinary manna does not melt in the sun, as this did ( Exo 16:21); \- It does not stink and breed worms, as this did, when kept till the morning ( Exo 16:20); \- It cannot be ground or beaten in a mortar,…”

“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). When the princes of the congregation informed Moses of this, he said to them, "Let tomorrow be rest (שׁבּתון), a holy Sabbath to the Lord." They were to bake and boil as much as was needed for the day, and keep what was over for the morrow, for on the Sabbath they would find none in the field. They did this, and what was kept for the Sabbath neither stank nor bred worms. It is perfectly clear from this event, that the Israelites were…”