Midrash for Exodus 31:14

“Vanity of vanities, said Kohelet; vanity of vanities, everything is vanity” (Ecclesiastes 1:2).
“Vanity of vanities [havel havalim]” – Rabbi Huna said in the name of Rabbi Aḥa: David made a statement and did not explain it, but his son Solomon explained it. Solomon made a statement and did not explain it, but his father David explained it. David said: “Man is like hevel” (Psalms 144:4); to what hevel [is man compared]? If it is to the hevel [heat] of an oven, it has significance. If it is to the hevel of a stove, it has significance. His son Solomon came and explained: “Vanity of vanities [havel havalim], said Kohelet.” Rabbi Shmuel bar Naḥmani taught it in the name of Rabbi Yehoshua ben Korḥa: It is comparable to a person who places seven pots on the fire one atop the other, and the heat of the upper one is insignificant.⁹This comparison is based on the fact that the term vanity [hevel] appears five times in Ecclesiastes 1:2, and twice it appears in the plural, for a total of seven mentions of the term hevel.
Solomon said: “For who knows what is good for man in his life, [all the days of his vain life,] that he spends like a shadow” (Ecclesiastes 6:12). What shadow? If it is like the shadow of a wall, it has substance. If it is like the shadow of a palm tree, it has substance. David came and explained: “His days are like a passing shadow” (Psalms 144:4). Rabbi Huna [said] in the name of Rav Aḥa: Like that bird that passes and its shadow passes with it. Shmuel said: Like the shadow of bees that have no substance at all.
Rabbi Shmuel bar Rav Yitzḥak taught it in the name of Rabbi Shimon ben Elazar: The seven vanities [havalim] that Kohelet mentioned correspond to the seven worlds that a person sees. A one-year-old is like a king who is on a canopied litter and everyone is hugging and kissing him. A two- or three-year-old is like a pig that extends its hands into the sewers. A ten-year-old jumps like a goat. A twenty-year-old whinnies like a horse, beautifies himself and seeks a wife. When he marries a wife he is like a donkey. When he begets children, he is as audacious as a dog to bring [home] bread and food. When he grows old, he is like a monkey. That is stated regarding the common people; however, regarding Torah personalities, it is written: “King David was old” – even though he was old, he was a king.
Rabbi Yehuda ben Rabbi Simon said: The seven vanities that Kohelet mentioned correspond to the seven days of Creation. On the first, “In the beginning God created the heavens and the earth” (Genesis 1:1), and it is written: “For the heavens will vanish like smoke” (Isaiah 51:6). On the second: “Let there be a firmament” (Genesis 1:6), and it is written: “The heavens will be furled like a scroll” (Isaiah 34:4). On the third: “Let the waters be gathered” (Genesis 1:9), and it is written: “The Lord will destroy the tongue of the sea of Egypt” (Isaiah 11:15). On the fourth: “Let there be lights” (Genesis 1:14), and it is written: “The moon will be disgraced” (Isaiah 24:23). On the fifth: “Let the waters swarm [with swarms of living creatures, and let fowl fly above the earth in the open firmament of heaven]” (Genesis 1:20), and it is written: “I will destroy the birds of the heavens” (Zephaniah 1:3). On the sixth: “Let us make man” (Genesis 1:26), and it is written: “I will destroy man and animal” (Zephaniah 1:3). Regarding Shabbat, what do you have to say? “One who profanes it will be put to death” (Exodus 31:14). That is stated regarding one who does so intentionally; but [one who profanes it] unwittingly, he will bring an offering and gain atonement. When Adam saw the praise of Shabbat, that one who brings an offering gains atonement, he began singing in its regard to the Holy One blessed be He, praise and psalm. That is what is written: “A psalm, a song for the day of Shabbat” (Psalms 92:1). Rabbi Levi said: This [psalm] was stated by Adam.

Resh Lakish said: "Whoever observes carefully the precepts concerning Tzitzith will, as a reward, have two thousand eight hundred servants to wait upon him; for it is said (Zech. 8, 23.) Thus said the Lord of Hosts, 'In those days it shall come to pass that ten men out of all the languages of the nations, shall take hold — yea, they shall take hold of the skirts of him that is a Jew, saying. Let us go with you, for we have heard that God is with you.' " We are taught that R. Nechemia says: "As a punishment for gratuitous hatred, the penalty is strife at the home of that man; and his wife will have miscarriages; and the sons and daughters of that man will die prematurely." R. Elazar, the son of R. Juda, said: "The punishment for the sin of neglecting to separate Challah is an unblessed harvest gathering; a curse will be sent upon the prices of food; and they will sow, but strangers will eat them up, as it is said (Lev. 26, 16.) Then will I also do this unto you; I will inflict on you terror, consumption and fever that consume the eyes and cause sorrow to the heart; and you shall sow your seed in vain, for your enemies shall eat it up. Do not read Behala (terror) but B'chala (on account of Challah), and if the separation of Challah is observed, then, blessings will follow, as it is said (Ezek. 44, 30.) And the first of your dough shall you give to the priest, to cause a blessing to rest on thy house." The punishment for the sin of neglecting laws concerning Terumah and tithes, is that the sky will withhold rain and dew; high prices [in food] will prevail; there will be no profits, and men will run about to earn a livelihood and will not succeed; as it is said (Job 24, 19.) Drought and heat speedily consume the snow waters; so doth the grave those who have sinned. What does that prove? In the academy of R. Ishmael it was taught that it means: "On account of your failure to discharge the duties which I commanded you to perform during the summer you will be robbed during the snow-water winter." But if they do give [Terumah and tithes] they will be blessed, as it is said (Malachi 3, 10.) Bring ye all the tithes into the storehouse that there may be provision in my house, and prove me but herewith, saith the Lord of Hosts, if I will not open for you the windows of heaven, and pour out for you a blessing Aad b'li duy? What is meant by Aad b'li duy? Rami b. Chama in the name of Rab said: "Until your lips grow tired of saying it is enough;" The penalty for the sin of robbery is an invasion of locusts; famine prevails, and people will be fed on the flesh of their own sons and daughters; as it is said (Amos 4, 1.) Hear this word, O ye cows of Bashan, that are on the Mount of Samaria, who oppresseth the poor, who crusheth the needy. (Fol. 33a) Raba said: "For instance, those women of Mechuza who eat but do nothing [they force their husbands to deal dishonestly and to rob]; and it is also written (Ib. ib. 9.) I had smitten you with blasting and mildew, etc., and your vineyards, your fig-trees and your olive trees did the caterpillar devour. It is also written (Joel 1, 4.) What the caterpillar left hath the cankerworm eaten, and that which the cankerworm left hath the crickets eaten; and it is also written (Is. 9, 19.) And he snatcheth on the right hand and is (yet) hungry; and he eateth on the left hand, and is not (yet) satisfied; every man shall eat the flesh of his own arm. Do not read Zero'o (his arm) but read Zaro (his children)." As punishment for the sin of delaying sentence, perverting sentence, corrupting sentence, and neglecting to study the Torah, the sword [of an enemy], with its terrible preying system, pestilence and famine, will come. People will eat but will never be satisfied; they will eat their bread by weight; as it is written (Lev. 26, 25.) And I will bring over you the sword, avenging the quarrel of my covenant. And it is also written (Ib. ib. 26.) When I break unto you the staff of bread; and ten women shall bake your bread in one oven, and they shall deliver your bread by weight, and ye shall eat and not be satisfied, i.e., the word Brith (covenant) refers to the Torah, for it is written (Jer. 33, 25.) If my covenant (Brith) were not by day and night, etc., and it is written (Lev. 26, 43.) Because even they despised my ordinances. As punishment for the sin of swearing in vain, swearing falsely, defaming of the name of God, and desecration of the Sabbath, wild beasts multiply, cattle are destroyed, the people decrease, and the roads become desolate, as it is said (Lev. 25, 23.) And if notwithstanding these things, ye will not be reformed by me. Do not read B'aile (these things) but read it B'ala (swearing), and it is written (Ib. ib. 22.) And I will send out against you the beasts of the field, etc. [Hence we know that the above punishment is for swearing falsely]. It is written concerning swearing falsely (Ib. 19.) And ye shall not swear by my name falsely and thou shalt not thus profane the name of God (Chilalta); concerning the defamation of the name of God it is written (Ib. 22, 12.) So that they profane not my Holy name (T'chalalu), and concerning the desecration of the Sabbath, it is written (Ex. 31, 14.) Every one that defileth it (Mechalaleha) shall surely be put to death. We infer from the word, Chillul (profanation) which appears in all three places [that the punishment for defaming God's name and desecrating the Sabbath is the multiplication of wild beasts, as it is in the case of swearing falsely]. As a punishment for the sin of shedding blood, the Temple is destroyed and the Shechina departs from Israel, as it is written (Num. 35, 33.) And ye shall not defile, etc., and ye shall not render unclean the land which ye inhabit, in the midst of which I dwell, i.e., but if ye do render unclean the land which ye inhabit, then ye will neither inhabit it nor will I live in your midst. As a punishment for the sin of adultery, idolatry and for the neglect of the laws concerning land in the Sabbatical years and the years of Jubilee exile comes, and other nations come and occupy the places of those exiled; as it is written (Lev. 18, 2.) For all these abominations have the men of the land done, etc., and again (Ib.) And the land became defiled, etc. Wherefore I have visited its iniquity upon it, etc. It is also written (Ib. ib. 28.) That the land may not submit you forth when ye defile it. Concerning the warning against idolatry, it is written (Ib. 26, 30.) And I shall cast your carcasses, etc. It is also written further And I will make desolate your sanctuary, etc. And ye will be scattered among the nations. Concerning the warning in the matters of the Sabbatical year and the year of Jubilee, it is written (Ib. ib. 34.) Then shall the land satisfy its Sabbath, all the days of its desolation, when ye are in the land of the enemies, etc. All the days of its supposed desolation shall it rest.

3) "and on the day": We are hereby taught that all of the day is valid for circumcision, but "the zealous are quick to do mitzvoth, as it is written (Bereshith 22:3): "And Abraham rose early in the morning" (for the binding of Isaac) "and he (himself) saddled his ass." "on the eighth day he shall circumcise," even on the Sabbath. And how am I to fulfill (Shemoth 31:14): "Those who desecrate it shall die"? With all of the other labors, other than that of circumcision. — But perhaps I am to fulfill "Those who desecrate it shall die" even with circumcision. And how am I to fulfill "on the eighth day he shall circumcise"? Except on the Sabbath. It is, therefore, written (to negate this) "and on the day," (to connote) even on the Sabbath.