מדרש על זכריה 1:16

“The Lord resolved to destroy the wall of the daughter of Zion. He drew a line, did not withdraw His hand from demolishing. He caused the rampart and wall to mourn, together they languish” (Lamentations 2:8).
“The Lord resolved to destroy the wall of the daughter of Zion.” Rabbi Yoḥanan said: It was not from the proclamation.¹⁰²God had decided to destroy Jerusalem long before the destruction was announced by the prophets (Matnot Kehuna). That is what is written: “For this city [has been a cause of My wrath and of My anger from the day that they built it until this day, to remove it from My presence]” (Jeremiah 32:31). Rabbi Eilam said: Like a person who is passing in a disgusting place and wrinkles his nose.¹⁰³The Hebrew word for “My anger” [api] can also be translated “my nose” (Matnot Kehuna).
“He drew a line.” There is a line for good and there is a line for bad. For good, “And a line shall be stretched forth over Jerusalem” (Zechariah 1:16). A line for bad, this one: “He drew a line.”
“Did not withdraw His hand from demolishing. He caused the rampart and wall to mourn, together they languish,” like that which Rabbi Huna son of Rabbi Aḥa said: A wall and a secondary wall.

... Another explanation. “When the Lord, your God, expands your boundary…” (Deuteronomy 12:20) The Rabbis say: this is speaking of Jerusalem. Who is able to see the calm of Jerusalem when the Holy One expands it? R’ Shimon bar Nachman says: to what is this to be compared? To a country, etc. “And then the offerings of Judah and Jerusalem shall be pleasant to the Lord, as in the days of old and former years.” (Malachi 3:4) “Lo, I will send you Elijah the prophet before the coming of the great and awesome day of the Lord, that he may turn the heart of the fathers back through the children, and the heart of the children back through their fathers-lest I come and smite the earth with utter destruction.” (Malachi 3:23-24) Behold I send My angel and he will clear the way before Me. And suddenly the Master whom you desire will come into His palace and the angel of the covenant whom you desire, behold he is coming says the Lord of Hosts. “Therefore, so said the Lord: 'I have returned to Jerusalem with mercy; My house shall be built there,' says the Lord of Hosts. 'And a plumb line shall be stretched out over Jerusalem.' Further, proclaim, saying: so said the Lord of Hosts, 'My cities shall yet spread out with prosperity, and the Lord shall yet console Zion and shall yet choose Jerusalem.'” (Zechariah 1:16-17) “Be exceedingly happy, O daughter of Zion; Shout, O daughter of Jerusalem. Behold! Your king shall come to you. He is just and victorious; humble, and riding a donkey and a foal, the offspring of she-donkeys.” (Zechariah 9:9)

The waters now are not just jostling for high position. They are crying like a family being torn apart. The lower waters long to go up in order to be reunited with their other half.

Rabbi Berachya in the name of Rabbi Beivai: ""Let the water below the sky be gathered (yiqqavu) (Genesis 1:9)": a limit was placed for the water. Similarly it is said: "The measuring line (qav) is being applied to Jerusalem (Zechariah 1:14)"". Rabbi Abba son of Kahana in the name of Rabbi Levi said: "Let the water below the sky be gathered"; what was he going to do with them? It is comparable to a prince who built a palace and settled in it mutes as tenants. and they rose and asked about the prince's health with sign language and with fingers and with cloths. The prince said: "How these people rise and asked about my health with sign language and with fingers; if they were people who had their faculties, how much more they would!" The prince settled in it tenants who had their faculties, and they stood and overcame the palace, and they said: "The palace does not belong to the prince but to us!" The prince said: "Return the palace to the way it was". Thus from the beginning, the praise of the Holy One, blessed be He, arose except from the waters. See! It is written: "Above the thunder of the mighty waters (Psalms 93:4)", and what did they say? "Hashem, majestic on high (Psalms 93:4)". The Holt One, blessed be He said: "How these who have no ability to speak or articulate, see how they praise me! How much more if man were created! And a generation of Enosh arose and rebelled against him, the generation of the flood and rebelled against him, the generation of the dispersal and rebelled against him. The Holy One, blessed be He said: "Remove these and return those". See! It is written: "Hashem said, “I will blot out from the earth the men which I created": "What do they suppose? I need assembled armies? Did I not with a word create the world? I with a word will bring them out and destroy them from the world"". Rabbi Berechya said: "All that I created, it is nothing but dust. What wipes off dust? Water".