In those days, Moshe was shepherding Re'uel's flock, etc. And a kid goat fled, and he chased after it to Mount Horev, the mountain of God. And he saw, behold, the bush was burning, etc. [Seder Olam and Tzemach David 59, page 2, and Bechaye in Parshat Bo, note 15, Nisan (Year 2447), the Divine Presence was revealed in the bush. (On the Sabbath day, the Holy One, blessed be He, was first revealed in the bush - Bereishit Shemot 31, page 2, in the name of Bat Bitan.) And He spoke with Moshe for seven consecutive days.] And Moshe and Aharon came to the king's gate, and two fierce lions surrounded it, and no man could go out or enter before them except for those whom the king commanded.
And the magicians came and removed the lions with their incantations. And Moshe hurried and raised the staff over the lions and released them, and Moshe and Aharon entered the king's palace, and the lions came with them joyfully, just as a dog rejoices for its master when he comes from the field. And Pharaoh was astonished and greatly amazed, for his appearance was like that of angels, etc. And Pharaoh called Bilaam and Yanus and Yambrus his sons and all the magicians and sorcerers, etc.
And Aharon acted and threw the staff, and it became a serpent. And the sorcerers did likewise, and the serpent from Aharon's staff raised its head and opened its mouth to swallow the serpents from the magicians' staffs. And Bilaam answered, "From ancient times this was a matter that a serpent would swallow its fellow, and a living creature would swallow its fellow. Now return it to a staff, and we too will return it to a staff.
And if your staff swallows our staffs, we will know that the spirit of God is in you," etc. And Aharon's staff swallowed their staffs, etc. And Pharaoh commanded to increase the burden on the children of Israel. And HaShem struck Egypt with blood, etc. [Bechaye wrote in Parshat Bo, the mnemonic 468 AD.
Two plagues with warning and one without warning, and so for all. The plagues of Egypt began on Rosh Chodesh Iyar (Seder Olam). And Ramban wrote that they were in Nisan. (In Pirkei d'Rabbi Eliezer chapter 9, on Thursday all the waters turned to blood.) And it was covered from blood for two months, as stated in the 40th chapter of Chazit, that is Iyar to the end of Tammuz. On Rosh Chodesh Av began the frogs.
Elul - lice. Tishrei - wild beasts. Cheshvan - pestilence. Kislev - boils.
Tevet - hail. (Bechaye wrote in Parshat Va'era, the hailstones remained between heaven and earth for 41 years.) Shevat - locusts. Adar - darkness. (Zohar in Parshat Bo.) See Bechaye in Parshat Bo: the plague of locusts was in Nisan when the trees begin to blossom. And hail in Adar. So wrote Ramban, and one must say according to his words that three plagues were in Nisan and the seven earlier ones were in eleven months.
Therefore the plague lasted more than seven days, and there were thirty days of relief between each plague. And from the verse "and seven days were filled" (Shemot 7:25) they learned that the relief between each plague was seven days. And Bechaye wrote that the Holy One, blessed be He, began to speak with him on the 15th of Nisan in the bush, and persuaded him for seven days. Those seven days were the seven days of Pesach.
After the 21st of Nisan, He sent him on his mission, and afterwards he went to Midian. At the end of Nisan, he came to Egypt, and it was covered with blood for three months as mentioned above. On Rosh Chodesh Av began the plague of blood. Elul - frogs.
Tishrei - lice. Cheshvan - wild beasts. Kislev - pestilence. Tevet - boils.
Shevat - hail. (See in Midrash Yelamdeinu and in Midrash 12 the matter of the plagues, and so it concludes in Bereishit.) Adar - locusts. Nisan - darkness until the sixth day, and the rest - seven days. On the night of the 14th it was said "at midnight" - the plague of the firstborn. And so it concludes in Parshat Bo.
In Shulchan Aruch Va'era, the first five plagues were until the 5th of Tishrei (and according to this the pestilence began on the eve of the 9th of Av).] And frogs. When the Egyptians drank water, their stomachs filled with frogs, and they would croak in their innards. When they were still in the river, they went to their beds and sweated all their sweat as frogs, etc. And there were lice in Egypt two cubits deep, etc.
And HaShem sent fiery serpents, scorpions, mice, weasels, frogs, crawling creatures of the dust, flies, locusts, fleas, gnats, mosquitoes, all kinds of wild beasts, and every creeping thing and every flying creature. And the fleas and flies came into the eyes of all Egypt and into their ears and pursued them into their innermost chambers. They were terrified and could not lock their doors because of the wild beasts.
And God commanded the huge lizard, which has arms twelve cubits long at the height of a man, and it would climb up and onto the roof and extend its arm and remove the lock and the bolt and open the houses of Egypt. And afterwards the wild beasts came into the houses of Egypt and destroyed Egypt, and it was distressing to them, etc. Pestilence, etc. And God sent a burning fire into the flesh of the Egyptians, and their flesh burst open and became boils and blisters, and their flesh ran, and they stank, etc.
And HaShem sent locusts, devourers, ravagers, and grasshoppers, and they salted them, etc. And HaShem turned a west wind and it carried the salted locusts, etc. [(And Bechaye wrote in Parshat Bo that one frog named the crocodile remained in the Nile, harmful to the children of Israel, and was killed by the crocodile. And from the time Moshe prayed in Egypt regarding the locusts, no locust destroyed anything in all that land.)] During the three days of darkness, many of the children of Israel died who rebelled against HaShem and did not listen to Moshe and Aharon and did not believe that HaShem had sent them.
And they said, "Let us not leave Egypt lest we die of hunger in the desolate wilderness." And the children of Israel buried them so that the inhabitants of Egypt would not know about them and rejoice over them, etc. [At the end of that year, on Thursday the 14th of Nisan (Year 2448), Israel slaughtered the Pesach sacrifice. (In Midrash Yelamdeinu, Shemot, section 172, on Thursday the 14th of Nisan they slaughtered the Pesach sacrifices, and so on.) And on the following night was the plague of the firstborn, etc. (Seder Olam). On Shabbat (Pirkei d'Rabbi Eliezer chapter 2), Rosh Chodesh Nisan, and the Pesach from which they left Egypt was on Thursday.
Therefore, Iyar should have been on Shabbat, and the end of Nisan on Shabbat. From the second of Iyar it seems the previous year was a leap year. In Pirkei d'Rabbi Eliezer chapter 9, on Thursday they left Egypt. And Ra'avam wrote in Parshat Pekudei, chapter 40, verse 2, according to the way of reasoning, they left on Friday before Thursday because it was concluded.] When the firstborn of Egypt who were engraved on the walls of their houses died, they were erased and fell to the ground along with the bones of their firstborn who had died before, and they were buried in their houses.
The dogs dug them up and dragged them before all Egypt, etc. And Batya, daughter of Pharaoh, went out with the king at night to seek Moshe, and they found them eating, drinking, and rejoicing. And Batya said, "This is the good reward that I raised you and nurtured you, and you brought upon me and my father's house this evil?" And he said, "Did not the ten plagues that HaShem brought upon Egypt harm you at all?" And she said no.
And Moshe said, "Also because you are a firstborn to your mother, you shall not die." And she said, "What advantage is there for me after I have seen the king my brother and all his household and servants in this evil, for all their firstborn died," etc. And he said to Pharaoh, "Also you are a firstborn to your mother; you shall not die," etc.