Rebbe Yehuda introduced [the idea] that the ten makkos are divided into 3 parts: ditzach blood frogs lice, that they are under the ground. That corresponding to what Paroh said, “Who is Hashem, I didn’t know of Hashem”, Hashem showed him the ten makkos, that he would know that in all parts of the creation I am Hashem. From under Me is the area of “there is none beside Him”, in front of Me is the area of “there is none beside Him”, and also above above in the air of the heavens, in all that exists there is none beside Him.

...and so we found in the terminology that is written that in the first 3 makkos “that they were in the land”. Its written by makkas dam “and stretch out your hand over the waters of mitzrayim and on their rivers and on their rivers and on their lakes.” And by makkas tzfardaya “stretch out your hand over the rivers and over the rivers and over the lakes.” and also for makkas kinim “stretch out your staff and strike the dust of the earth.”

The first makkah was the blood that it had a nature of fire and warmth. The second makkah was frogs that it had the nature of water- the opposite of fire. After these 2 makkos, the makkah that was the average between them came, and it is the makkah of lice, that grow from the merging of humidity/moisture and warmth.

And the reason for the makkos in a general sense is, that Hashem said: Since Paroh was arrogant about the river, to say ‘the river is mine and I made it’, and therefore the makkah started in the river that it was made into blood. And the frogs came that live on the water and came to exact revenge on them in mitzrayim, that they (the mitzrim) came to destroy am yisrael from the world that they were to receive in the future the torah that is compared to water….And the lice came, that were born from the dust, and were sent as payback from the mitzrim, that they sought out to destroy B”Y that are compared to dust, as it says “who can count the dust of Yaakov?”

And blessed is Hashem that He brought the Makkos on the mitzrim like the way that they behave in the world when a king fights against his friend. From the beginning, they stop water from him, and they block for him all the ways that through them water comes into the palace. And so Hashem did. That at the beginning He turned all the waters of the river to blood, and also all the waters of mitzrayim. And there was for none of them anything to drink, even one drop, and they were dying of thirst. And if he did not succeed with this, he brings on them all types of trumpets and blasting instruments that make different blasts so that fear will fall on them… and so Hashem brought on them the frogs, that their croaking would scare the mitzrim. And the pain was greater because they were croaking inside their innards because they were biting them, until they were falling like dead people, as we told in its place. After that, the king sends against them arrows and weaponry/catapults. So the lice would enter into their bodies like thorns.

Each one of these three groups of plagues was designed to heal the false ideas of Egypt, that they had the merit to impose on the Jews: strangerness, servitude, and suffering. Dtzach will achieve this goal in a way that it will be seen to the eyes of all the rulership of Hashem over the water and the land...Dam, Arov, and Barad represent/are strangerness. The “stranger” is a man that his dwelling in a land depends on the good will of others and their tolerance. The internal essence of the Egyptians stemmed from fear; Since they would give thanks to the river when it overflowed annually, the Egyptians were proud about their land, and they felt exalted above all the other nations. They even thought of themselves as not relying on the gifts of Heaven, with their saying: “The river is for me and I made it.”; and behold in the middle of the plague of blood, Hashem said to them: “Your river is Mine”; If it is My will [to do] so, it is not just that your river will dry out, but also I will bring upon you degeneration instead of blessing and success, and it will spit you out from your land. You yourselves are only “strangers” in this land, and you will remain in it only as long as it is My will.

"And in your ovens and in your kneading bowls”- and when the remaining were found in the oven, at that the time that the oven was warm. It teaches that they were completing/being content with themselves inside the oven, to sanctify the Name of Hashem. And what was paid to them? that all the frogs died, and these that went down to the oven did not die because they gave over themselves to be burned in order to fulfill the decree of Hashem. And it needs an explanation: weren't they commanded and standing to fulfill “and in your ovens”? Why did they merit that they should come up out of the oven alive?... And the question is famous: weren’t the frogs being forced by the rage of the commandment of Hashem?... It explains that the commandment didn’t come specifically on a certain group from the frogs, that they were the ones that would be the sacrifices in the ovens. Rather, that there was a general/inclusive commandment of “in your ovens and in your kneading bowls” and the frogs knew that if not one of them went into the warm oven, then the will of Hashem would chos vshalom be nullified. And therefore even though they weren’t commanded and obligated on sanctifying Hashem, nevertheless “they gave themselves over to burning”, not because that they were commanded specifically, rather “in order to fulfill the decree of Hashem.”

(Each one of these three groups of plagues was designed to heal the mitzrim from the false ideology, that they had the merit to impose on the Jews: strangers, servitude, and suffering…) Tzfardaya, Dever, and Arbeh- meaning servitude. A master that thinks of himself as elevated over his servants is given to a double false vision: the first is that he is relevant/related to a very supreme type; and the second is that he was elevated in merit of his strength and wealth. And behold the frogs, that are the most afraid among all organisms, that in general they hide from the eyes of humans in water and between the reeds; are now coming out from their hiding places and bursting out with courage and daringness into the dwelling places of the land, and with this they freed the arrogance of the heart from their ideas of supremacy, with their showing that even the smallest and lowest creations destroyed all the rustles of honor toward them.

Kinim, Shchin, and choshech- these are suffering. Now the mitzrim learned the characteristic of a life full of suffering, pain and poverty. This lesson wore the shape of physical pain and suffering- the lice, the boils, and the three days of imprisonment and nights that came on the mitzrim through the darkness. In order to imprison man, Hashem does not need heavy chains or a jail. Hashem imprisons a man in the middle of the darkness of night: He deprives movement and he does not dare to move, and he remains rooted in his place without food, until Hashem gives him the returnal of light.

and behold the makkah of the river, and with the sin that pharaoh said "the river is mine and I made it." and with the sin of sending the children to he river, and the dying of the fish was because that they wanted to remove from yisral the bracha “and they will increase to be many in the midst of the land”

The frogs came, because that he denied in Hashem and he said “I do not know Hashem,” therefore the frogs came that they knew Hashem and were risking their lives to sanctify the name of Hashem Yisbarach like I said above, and the river swarmed with these same frogs because the confession of the convict is like 100 witnesses testimonies, because they said that the river was god.

Lice came upon them, because all masters of hard work filled with lice that come from the sweat that is found within the toiling and the heat of the body, and the fact that the dust of the earth was made into lice, since all their work was in the field meaning the dust of the land and it that caused to them the sweat and lice, therefore the dust of the land brought the kinim also on the Mitzrim.