מדרש על איכה 2:15

“All wayfarers clapped their hands over you; they whistled and shook their heads at the daughter of Jerusalem: Is this the city that was said to be perfect beauty, the joy of the entire earth?” (Lamentations 2:15).
They “clapped their hands over you.” Rabbi Yoḥanan said in the name of Rabbi Shimon bar Yoḥai: There was a dome of inventory outside of Jerusalem, and anyone who sought to take inventory would run and take inventory there,¹¹⁷Anyone who wanted to take an accounting of his expenditures or business activity could stop under this dome and make his calculations. so that he would not emerge from Jerusalem upset,¹¹⁸Some commentaries assert that the text should read: So that they would not take inventory in Jerusalem and be upset. This is the version of the text found in Shemot Rabba 52:5 (Etz Yosef). to realize what is written: “The joy of the entire earth.” But now, they “clapped their hands over you; they whistled and shook their heads at the daughter of Jerusalem.”
The cities of the nations sing their praise with their mouths. That is what is written: “[Tyre], you said: I am perfect in beauty” (Ezekiel 27:3). But Jerusalem, others recite its praise with their mouths. That is what is written: “Is this the city that was said to be perfect beauty, the joy of the entire earth?”
Rabbi Natan said: A merchant ascended to sell wool. He fell asleep and did not sell. He said: Is this [the city] about which you say that it is “the joy of the entire earth”? He awoke and sold it. He said, you spoke well: “The joy of the entire earth.”

And it shall be if you listen to listen (Deuteronomy 28:1): If you listened a little, your end will be to listen much. Another interpretation: You will make your studies heard in front of the Holy One, blessed be He. When will you make your studies heard? Rabbi Yehudah says, "At the time that he comes to part from the world, as it is stated (Ecclesiastes 12:13), 'The end of the matter, everything is heard.'" And Rabbi Meir says, "until he completes his soul, as stated (Job 10:22), 'gloom and not arranged,' as he arranges his study." Another interpretation: "If you surely listen," your prayer will be heard, like Choni the Circle-maker. At the time that Israel required rain, they went into him and said to him, "Pray for us, as we need rain." Immediately, he drew a circle and stood inside it, to fulfill that which is stated (Habakuk 2:1), "I will stand on my watch." The rain began to drizzle. He said, "This is not what I requested, but rains of desire, blessing and freewill." The rain [then] began to fall in its accustomed way. What caused him to be one who prays, such that the Holy One, blessed be He listens to his prayers? [It was] because he listened to the words of the Torah. Another interpretation: If you listen in this world, you will listen [to it] in the world to come from the mouth of the Holy One, blessed be He. Rabbi Yonah the father of Rabbi Manna said in the name of Rabbi Levi who said in the name of Rabbi Abba, "The Torah was not supposed to have been given to Israel in this world. Why? Because everyone will learn it from the mouth of the Holy One, blessed be He, in the future, in the world to come. [So] why was it given to them in this world? So that when the Holy One, blessed be He, comes to teach them in the world to come, everyone will know in what section He is occupied." Therefore, if you listen in this world, you will listen in the world to come from the mouth of the Holy One, blessed be He. Another interpretation: If you merited to listen to words of the Torah that were given with many voices, you will merit to hear that voice about which it is written (Jeremiah 7:34), "the voice of gladness and the voice of joy." Another interpretation [of] "if you listen to listen": If you have listened to the voice of your teacher, your end is that others [will] listen to you. "To guard to do" (Deuteronomy 28:1). You should only study in order to do. Rabbi Yochanan said, "Anyone who studies [Torah] but does not do [what he studied], it would have been better had his placenta turned over his face (died in the womb). But if you merited to guard and to do, 'the Lord your God will set you high above (elyon)' (Deuteronomy 28:1)." Rabbi Levi said, "What is [the meaning of] elyon? It is like this thumb (alyon). If you merited, behold you will be above the four fingers, 'and the Lord your God will set you high above,' on condition. But if not, 'the stranger that is in your midst will rise higher and higher' (Deuteronomy 28:43)." "Blessed shall you be in your coming" (Deuteronomy 28:6), on condition [that it is] in your coming to the synagogues and study halls; "and blessed shall you be in your going," from the synagogues and study halls. "You shall be blessed in the city and you shall be blessed in the field" (Deuteronomy 28:3). It should have said, "You shall be blessed in the field and you shall blessed in the city," as it is from what he brings in from the field that he is blessed in the city. Rather what do we learn to say [from,] "You shall be blessed in the city and you shall be blessed in the field?" If you have come to the commandment in the city, do not say, "I was only commanded in the field to extract the priestly tithes and the [other] tithes outside." The Holy One, blessed be He, said, "Open your hand [to give tithes] also in the city." Another interpretation: "You shall be blessed in the city," with the commandments that you do in the midst of your house in the city, such as sukkah, mezuzah and parapet. "You shall be blessed in the field," [with the commandments that you do in the field], such as [leaving] gleanings, forgotten sheaves, and the corner [of the field]. Another interpretation: A man should not say, "If the Holy One, blessed be He, had given me a field, I would have extracted tithes from it. [But] now that I do not have a field, I will not give anything." The Holy One, blessed be He, says [in response], "See what I have written in My Torah, 'You shall be blessed in the city,' for those living in the city; 'and you shall be blessed in the field,' for those that have fields." "Blessed shall be your basket" (Deuteronomy 28:5). These are the first-fruits that you you bring up to Jerusalem, as it is stated (Deuteronomy 26:4), "And the priest shall take the basket from your hand." "And your kneading bowl" (Deuteronomy 28:5), that is the challah tithe. "[Blessed shall be...] the calving (shegar) of your herd" (Deuteronomy 28:4). Rabbi Yehudah bar Shalom said, "That they shall be moving (shegurin) and coming out [effortlessly] like [from] the mouth of a box; 'and the lambing (ashterot) of your flock' (Deuteronomy 28:4), that they should be as strong as boulders (ashterot)." Another interpretation: "You shall be blessed in the city," this [refers to] Jerusalem, which is called a city, as it is stated (Lamentations 2:15), "Is this the city that they said was the perfection of beauty?" "And you shall be blessed in the field," this [refers to] Zion, as it is stated (Jeremiah 26:18), "Zion shall be plowed for a field." And when will the Holy One, blessed be He, show this blessing to Israel? When Jerusalem is rebuilt and the exiles are returned within her, as it is stated (Psalms 133:3), "As the dew of Hermon which runs down on the mountains of Zion, for there the Lord commanded the blessing, life forever." [May it happen] speedily in our day, Amen!

(Gen. 42:1, cont.:) THEN JACOB SAID TO HIS CHILDREN: WHY ARE YOU MAKING YOURSELVES CONSPICUOUS? Jacob said to them: Will you please hide yourselves, for there is nothing more harmful than the evil eye?²²Gen. R. 91:2, 6; Tanh., Gen. 10:8. And so you find in the case of the former tables (of the Torah), because they had been given in grandeur (before all eyes), they had been shattered. Thus it is stated (in Exod. 20:15 [18]): NOW ALL THE PEOPLE SAW THE THUNDERINGS. But when the second tables were given, no one saw them but Moses, since it is stated (in Exod. 34:3): BUT LET NO ONE COME UP WITH YOU…. So also Jerusalem would not have been destroyed except for the evil eye. Thus it is stated (in Lam. 2:15-16): IS THIS THE CITY WHICH THEY CALLED A PERFECTION OF BEAUTY, A JOY TO THE WHOLE EARTH? < ALL YOUR ENEMIES JEER OVER YOU; THEY HISS AND GNASH THEIR TEETH; THEY SAY: WE HAVE DESTROYED HER! INDEED, THIS IS THE DAY WE HAD HOPED FOR. WE HAVE FOUND IT; WE HAVE SEEN IT >. It also says (in Lam. 3:51): MY EYE DOES EVIL TO MY SOUL BECAUSE OF ALL THE DAUGHTERS OF MY CITY. Jacob therefore said: Do not look at yourselves. It is so stated (in Gen. 42:1): THEN JACOB SAID TO HIS CHILDREN: WHY ARE YOU MAKING YOURSELVES CONSPICUOUS? Rather walk privately (rt.: TsN'), as stated (in Micah 6:8): HE HAS TOLD YOU, O HUMAN, WHAT IS GOOD…. AND TO WALK HUMBLY (rt.: TsN') WITH YOUR GOD.