Midrash su Salmi 94:12

And these are the names of the Sons of Israel that came into Egypt with Yaakov, every man came with his household – There it is written (Mishlei 13, 24): “He who spares the rod hates his son; but he who loves him disciplines him in his youth.” Ordinarily in the world, if a person says to his friend: “So-and-so hit your son”, he would be ready to reduce his livelihood. And why is it taught “ He who spares the rod hates his son”?! In order to teach you, that anyone who refrains from disciplining his son in the end causes him to fall into evil ways and will hate him. This is what we have found with Yishmael, who behaved wickedly on Avraham his father but did not rebuke him, with the result that he fell into evil ways and he hated him and he left from his house with nothing. What did Yishmael do when he was fifteen years old? He started to bring idols from the market and he would play with them and worship them as he had seen others do, immediately (Bereishit 21, 9) “And Sarah saw the son of the Egyptian Hagar that she had given birth for Avraham was fooling around etc…” And there is no fooling except for idol worship, like that it says (Shemot 32,6): And they rose up to fool around. Immediately (Bereishit 21,10): And she said to Avraham , Send out this maid-servant and her son, perhaps my son will learn from him. Immediately, (Bereishit 21,11) And this thing was very bad in the eyes of Avraham etc...on account of his son because he had become evil. (Bereshit 21,12) And G-d said to Avraham, do not let it be evil in your eyes etc... From here you can learn, that Avraham was secondary to Sarah in prophecy, following on, (Bereishit 21,14): And Avraham got up in the morning and he took bread and a bottle of water, to teach you, that he hated Yishmael because of his evil ways, and sent him and his mother Hagar empty-handed and expelled them from his house because of this. Do you really think that Avraham, of whom it is written (Bereishit 13,2): And Avraham was very rich in cattle etc... that he would send his wife and his son from his house empty-handed, without clothes or means of a livelihood?! Rather, this is to teach you, since he turned evil, he stopped thinking about him. What was his end? After he had been expelled, he sat at the cross-roads and was a bandit, as it says (Bereishit 16,12): And he was a wild man. And similar to this (Bereishit 25,28): And Yitzchak loved Esav, therefore he turned to evil ways, because he was not rebuked, like we were taught: Five transgressions the evil Esav transgressed on that day: He seduced an engaged lady, and killed a man, denied resurrection, and rejected the fundamentals of religion and spurned his birthright, that he desired the death of his father, and sought to kill his brother, as it says (Bereishit 27,41):May the days of mourning for my father be brought close etc.. And he forced Ya'acov to flee from his father. And he even went with Yishmael, to learn from his evil ways and to add to his wives, as it says (Bereshit 28,9): And Esav went to Yishmael. Similarly with David, that he did not rebuke or chastise his son Avshalom, he turned to evil ways and sought to kill his father, and he lay with concubines, and becoming the cause if his wandering, bare-footed and crying, and many thousands and myriads of Israelites were slaughtered, and he caused much suffering upon them which did not end. As it is written (Psalms 3,1): A song of David, when he fled from Avshalom his son, just as it was written after (Psalms 3,2) How great in number have my enemies become etc. And cultural evil is harsher on one's home than the war of Gog and Magog, for regarding the war of Gog and Magog it says: (Tehilim 2:1) "Why do the nations stir?" and later it is written: (Tehilim 3:2) "God, how many my enemies are!" And similarly David behaved with Adoniyah, he did not beat him in punishment, and did not get angry at him, and therefore he left to cultural evil, as is written: (Kings 1 1:6) "And his father never scolded him...and she bore him after Avshalom." Wasn't Avshalom the son of Maacha, while Adoniyahu was the son of Chagit? What does it mean, "she bore him after Avshalom"? Instead- since he [Avshalom] left to cultural evil, and his father never beat him, and it is written about Adoniyahu "his father never scolded him," he too left to cultural evil, and therefore it is written: "and she bore him after Avshalom." (Proverbs 13:24) "But he who loves him disciplines him in his youth" refers to the Holy Blessed One, who loves Israel, as it is written (Malachi 1:2) "I have loved you, says God," who increases their suffering. One can find three good gifts that the Holy Blessed One gave to Israel, and they were each given only by means of suffering: the Torah, the Land of Israel, and life in the World to Come. The Torah, as it is written: (Psalms 94:12) "How lucky is the man who You discipline, God, and to whom You teach Your Torah." The Land of Israel, as it is written: (Deuteronomy 8:5) "Bear in mind that the LORD your God disciplines you just as a man disciplines his son." What is written next? (Deuteronomy 8:7) "For the LORD your God is bringing you into a good land..." The World to Come, as it is written: (Proverbs 6:23) "For the commandment is a lamp, the teaching is a light, and the way to life is the rebuke that disciplines." And when anyone rebukes his son, the son increases his love for his father, and he honors him, as it is said: (Proverbs 29:17) "Discipline your son and he will give you peace." And it says: (Proverbs 19:18) "Discipline your son while there is still hope." And he increases his love for him, as it says: "But he who loves him disciplines him early," meaning because he disciplines him early, therefore he loves him. You find that Abraham disciplined Isaac his son and taught him Torah and guided him in his ways, as is written about Avraham: (Genesis 26:5) "In return for Avraham's obedience to my voice" and it is written: (Genesis 25:19) "These are the descendants of Isaac, son of Abraham," which teaches you that he was similar to his father in all ways- in beauty, in wisdom, in wealth, and in good deeds. You should know that he [Isaac] was thirty-seven years old when his he was bound by his father, and it is written: (Genesis 24:1) "And Abraham was old, advanced in age" and yet he bound him and positioned him like a lamb, and he did not refuse. Therefore: (Genesis 25:5) "Abraham gave all that he had to Isaac," Which is to say, "he who loves him disciplines him early." In the same manner, Isaac would discipline Jacob early, for Isaac taught him Torah and disciplined him in his house of study, as it says: (Genesis 25:27) "but Jacob was a mild man who stayed home." And he learned what his father taught him, and then he separated from his father and hid in the house of Ever to study Torah. Therefore he merited blessing and inherited the land, as it says: (Genesis 27:1) "Jacob lived in the land of his father's residence, in the land of Canaan." And even our Patriarch Jacob disciplined his sons, and beat them and taught them his ways, so that none of them would be disposable, as it is written: (Exodus 1:1) "These are the names of the sons of Israel who arrived to Egypt..." The verse equates them all to Jacob, for they were all righteous as he had been. This resolves: "But he who loves him disciplines him early."

It is taught that R. Simeon the son of Yohai stated: You find that the Holy One, blessed be He, bestowed three precious gifts upon Israel, but He gave them only through suffering: the law, the land of Israel, and the world-to-come. The law, for it is written: Happy is the man whom Thou instructest, O Lord, and teachest out of Thy law (Ps. 94:12). Concerning the land of Israel it is written: You shall realize that the Lord your God chastises you as a man chastises his son (Deut. 8:5). What is written afterward? For the Lord thy God bringeth thee into a good land (ibid., v. 7); and of the world-to-come it is written: For the commandment is a lamp, and the teaching is light, and reproofs of instruction are the way of life (Prov. 6:23). Every father who chastises his son increases the child’s love and respect for his father, as it is written: Chasten thy son, for there is hope; but set not thy heart on his destruction (ibid. 19:18). Hence, But he that loveth him chasteneth him betimes.

R. Simon b. Lakish said: "Whoever studies the Torah will prevent affliction from coming upon him, for it is said (Job 5, 7.), And the sons of fire take up their flight. By Uf (flight) is meant nothing else but the Torah, as it is said (Pr. 23, 5.) When thou letteth merely thine eye fly over it (i.e., if you study the Torah by merely glancing over it with your eyes), it is no more, (you will easily forget it). And Reshef (fire) means nothing else but affliction, as it is said (Deu. 32, 24.) Devoured with evil spirits." "Aye." exclaimed R. Jochanan, "even the school children know this! for it is said, (Ex. 15. 2.5.) And he said, if thou wilt deligently hearken unto the voice of the Lord and wilt do what is riqht in His eyes, etc. But it means thus: Upon him who is capable of studying the Torah, but does not do so the Holy One, praised be He! will bring repulsive suffering which will greatly disturb him; for it is said (Ps. 39, 3.) I was dumb in deep silence, I was quite still even from speaking good, but my pain greatly disturbed me. By tob (good) is meant nothing else but the Torah, for it is said (Pr. 4, 2.) For good doctrine do I give, etc." R. Zeira, and some say, R. Chanina b. Papa, said: "Come and see that the custom of the Holy One. praised be He! is not like the custom of mortal men. The custom of mortal men is that if a man sell a valuable thing to his fellow-man, the seller is sorry and only the buyer is happy; but the custom of the Holy One, praised be He! is not so. He bestowed the Torah on Israel and He rejoiced, for it is said (Ib. 4, 2.) For good doctrine do I give thee." Raba, and according to others R. Chisda, said: "If a man see that troubles are coming unto him, let him search his deeds, for it is said, (Lam. 3, 40) Let us search through and examine our ways and let us return unto the Lord. If he has investigated and found nothing wrong, then let him attribute it to a neglect of the study of the Torah. for it is said (Ps. 94, 12.) Happy is the man whom Thou admonisheth, O Lord, and teacheth out of Thy Torah. But if he investigated and did not find [neglect of the study of the Torah] then it is known that his affliction is the cause of God's love, for it is said (Pr. 3, 12.) Because whomsoever the Lord loveth He admonisheth." Raba, in the name of R. Sechorah, who quoted R. Huna, said: "Whomsover the Holy One, praised be He! loveth. He afflicteth, for it is said (Is. 53, 10.) But the Lord was pleased to crush him through disease. We might think that, even if he does not accept the affliction with resignation. It is therefore said (Ib.) When his soul hath brought the trespass-offering, i. e., just as a guilt offering must come with his acknowledgement, so also must this be accepted with resignation. And if he accept it with love what will be his reward? Then shall he see (his) seed live many days, (Ib.) and moreover his learning shall endure with him, as is said (Ib.) And the pleasure of the Lord shall prosper in his hand." As to affliction, there is a difference of opinion between R. Jacob b. Ide and R. Acha b. Chanina. One holds that all such affliction which does not prevent one from studying the Torah is one of love, for it is said (Ps. 94, 12.) Happy is the man whom Thou admonisheth, O Lord, and teacheth from Thy Torah; and the other holds that such affliction which does not prevent one from praying is one which comes from love, for it is said (Ps. 66, 20.) Blessed he God who hath not removed my prayer nor His kindness from me. R. Abba, the son of R. Chiya b. Abba, said: "Thus said my father (R. Chiya) in the name of R. Jochanan; 'Both of these afflictions are the kind which come from love, for it is written (Pr. 3, 12.) Because whomsoever the Lord loveth He admonisheth; But what do we learn [from the passage] Thou teacheth him of the Torah. Do not read Tlamdenu (that he should be able to study the Torah); but read it Tlamdainu (Out of Thy Torah, Thou teacheth us) i. e., we learn from thine Torah [that one who is punished by God should be happy] namely, through the rule of a fortiori concerning the tooth and the eye; that if the loss of a tooth or an eye [stricken out by the master] which affects only one member of the human body, frees the slave, how much more then are afflictions, which affect the whole human body, capable of cleaning one of evil.'" And that is meant by R. Simon b. Lakish, for he said: "It is said Convenant (Brith) in connection with the word salt, and it is said Convenant (Brith) in connection with the word affliction. Covenant by salt — as it is written (Lev. 2, 13.) Thou shalt not suffer the salt of the covenant (Brith)! Covenant by affliction — as it is written (Deu. 28, 49.) These are the words of the covenant. (Brith) Just as the covenant of the salt was made to sweeten meat, so the covenant of affliction was made to cleanse man of all iniquities."