Midrash su Zaccaria 14:9

(Zech. 14, 9) And the Lord will be king over all the earth; on that day shall the Lord be (acknowledged) One, and His name be One. Is He then not One to-day? R. Acha b. Chaninah said: "This world is not like the world to come; in this world, when good tidings are received, a man says: Blessed be He who is good and beneficent and upon the information of bad tidings, he says: Blessed be He, the true Judge. But in the world to come, only the first benediction will be pronounced [for there shall be no more bad tidings]." His name shall be One. What means this passage? Is then His name not One even today? R. Nachman b. Isaac said: "Not as this world is the world to come; in this world His name is written Yud, Hay, and pronounced Alef, Daleth, while in the world to come it will be pronounced as it is written, with Yud, Hay." Raba wanted to lecture [concerning the explanation of God's name] from the pulpit; so a senior scholar warned him against it, saying: "It is written (Ex. 3, 14) [This is my name] Le'olam [hence you must not openly discuss it]." R. Abina raised the following contradiction: "It is written, This is my name, Le'olam (to de concealed), and then it is written, This is my memorial unto all generations [showing that it should be read without concealing it];" i.e., "Thus said the Holy One, blessed be He! Not as My name is written shall it be pronounced: it is written Yud, Hay, but is prononced Alef Daleth."

“May You pursue them in wrath and destroy them from under the heavens of the Lord” (Lamentations 3:66).
“May You pursue them in wrath and destroy them” – Jeremiah said: “May you pursue them in wrath and destroy them.” Moses said: “For I will erase [maḥo emḥe] the memory of Amalek from under the heavens” (Exodus 17:14). Shmuel said: “Amalek” – in its plain sense; “memory” – this is Haman; maḥo – in this world; emḥe – in the World to Come; “from under the heavens” – for him and for all the members of that generation [and] until the end of all generations. Rabbi Yehoshua said: So that there will not be a son and a grandson for Amalek under the heavens, so [people] will not say: This tree is Amalek’s, this camel is Amalek’s, this sheep is Amalek’s. Rabbi Eliezer said: Because it sought to eliminate Israel from under the wings of the heavens, Moses said before the Holy One blessed be He: This wicked one seeks to eliminate Israel from under Your wings. The Torah scroll that You gave them, who will read it?
Another matter: Because it sought to eliminate Israel, who are destined to be scattered from one end of the world to the other, as it is stated: “From the end of the earth to the end of the earth” (Deuteronomy 28:64).
Rabbi Eliezer says: When will the name of these be eliminated from the world, and idolatry and its worshippers will be eliminated from the world, and the Holy One blessed be He will be one in the world,⁸⁵He will be acknowledged as the one, true God. like the matter that is stated: “The Lord will be King over all the land; on that day the Lord will be one and His name one” (Zechariah 14:9)? At the time when, “may you pursue them in wrath and destroy them from under the heavens of the Lord.”
Rabbi Natan said: Haman came only to provide a remembrance for Israel.⁸⁶This is in explanation of the statement earlier that the word “memory” (Exodus 17:14) alludes to Haman. Through the story of Purim, Jews continue to preserve the memory of Amalek and its actions, as well as the requirement to destroy Amalek, as required by the Torah (Deuteronomy 25:17–19). That is what is written: “These days of Purim will not pass from among the Jews, and their memory will not cease from their descendants” (Esther 9:28).
End of the Third Alphabetical Acrostic

Alternatively: (Deuteronomy 17:14) "And you will say, 'I will appoint for me a king..." - Our rabbis said: Said the Holy One, blessed be He, "You want kings in this world. Jewish kings will be appointed, and they will make you fall by the sword." Shaul caused them to fall at Mt. HaGilboa. How do we know? (I Samuel 4:17) "And Israel fled from before the Philistines..." David caused a plague to be sent, as it says, (II Samuel 24:15) "And God sent a pestilence to Israel..." Achav stopped up the rains from them, as it says (I Kings 17:1) "...there shall not be dew nor rain these years..." Tzidkiyahu caused the destruction of the Holy Temple. Once Israel saw what happens under the rule of their kings, they all began to cry out, "We don't want a king of Israel! We want our furst King: (Isaiah 33:22) "For God is our judge, God is our law-giver, God is our king, He will save us!" The Holy One, blessed be He, said to them, "By your lives, thus will I do." How do we know? As it says, (Zachariah 14:9) "And God will be the king over all the earth..."