22 On the sixth day they gathered twice as much food, two omers apiece. When all the leaders of the congregation came and told Moses, 23 he said to them, "This is what the Lord has commanded: "Tomorrow is a day of solemn rest, a holy sabbath to the Lord; bake what you want to bake and boil what you want to boil, and all that is left over put aside to be kept until morning.' " 24 So they put it aside until morning, as Moses commanded them; and it did not become foul, and there were no worms in it. 25 Moses said, "Eat it today, for today is a sabbath to the Lord; today you will not find it in the field. 26 Six days you shall gather it; but on the seventh day, which is a sabbath, there will be none." 27 On the seventh day some of the people went out to gather, and they found none. 28 The Lord said to Moses, "How long will you refuse to keep my commandments and instructions? 29 See! The Lord has given you the sabbath, therefore on the sixth day he gives you food for two days; each of you stay where you are; do not leave your place on the seventh day." 30 So the people rested on the seventh day. 31 The house of Israel called it manna; it was like coriander seed, white, and the taste of it was like wafers made with honey.
Matthew Henry's Commentary on Exodus 16:22-31
Commentary on Exodus 16:22-31
(Read Exodus 16:22-31)
Here is mention of a seventh-day sabbath. It was known, not only before the giving of the law upon mount Sinai, but before the bringing of Israel out of Egypt, even from the beginning, Genesis 2:3. The setting apart one day in seven for holy work, and, in order to that, for holy rest, was ever since God created man upon the earth, and is the most ancient of the Divine laws. Appointing them to rest on the seventh day, he took care that they should be no losers by it; and none ever will be losers by serving God. On that day they were to fetch in enough for two days, and to make it ready. This directs us to contrive family affairs, so that they may hinder us as little as possible in the work of the sabbath. Works of necessity are to be done on that day; but it is desirable to have as little as may be to do, that we may apply ourselves the more closely to prepare for the life that is to come. When they kept manna against a command, it stank; when they kept it by a command, it was sweet and good; every thing is sanctified by the word of God and prayer. On the seventh day God did not send the manna, therefore they must not expect it, nor go out to gather. This showed that it was produced by miracle.