(1) ADONAI SAID TO MOSHE while he was standing in front of Par'oh, "ONE MORE PLAGUE, ETC." And after that, Moshe responded to Par'oh (v.4), "Thus says the LORD: At midnight, etc."

(2) ONE AND ALL (KALAH). All -- men, women, children, and livestock.

וישאלו, to be an outright gift, just as in Psalms 2,8 שאל ממני ואתנה נחלתך, “ask of Me, and I will give your inheritance.”

'ויאמר משה לפרעה כה אמר ה' כחצות הלילה, וגו, the construction of כחצות is derived from the root חצה just as כעשות is derived from the root עשה, or as in the expression כעלות המנחה the word כעלות is derived from the root עלה. In other words, the meaning of כחצות הלילה is: “as soon as midnight arrives.” אני יוצא בתוך מצרים, when it came to the execution of this prophecy the Torah writes instead: ויהי בחצות הלילה, “it was exactly at midnight.” (12,12). This is the plain meaning of the text. The reason Moses had to use a slightly different formulation was that he meant to say that G’d will divide the night into 2 halves, יחצה. Seeing that the word כחצות describes an activity by G’d being performed at a certain time, Moses could not merely have described the time without avoiding reference to G’d doing something at that time.

אשר אחר הרחיים, later on the simile is changed and the Torah speaks about השבי אשר בבית הבור, “the prisoner in the dungeon.”(12,29) There is no contradiction, seeing that we know from Judges 16,21) that Shimshon as well as other prisoners were obliged to act as the “horse-power” turning the millstones while they were incarcerated.

אשר כמוהו לא נהייתה, although we have a mixture of masculine and feminine construction here, this is only one of many such examples in the Torah. Genesis 32,9 המחנה האחת והכהו is just one such example which is well known.

לא יחרץ כלב, the angel proceeds to afflict and kill the firstborn of the Egyptians. By contrast, the Jewish firstborn did not even have to endure the barking of a dog.

וירדו כל עבדיך, Even at this point Moses respected royalty, and, when referring to something undignified for a king, instead of describing the indignity as being something the king had to endure, described it as something his servants would have to endure. Let us look at the facts reported in the Torah: While the dying was in progress, the Torah reports Pharaoh as rising from his sleep in 12,30-31 calling in Moses and Aaron and doing exactly what Moses had predicted at the time Pharaoh had expelled him from his presence. (10,29)

לא ישמע אליכם פרעה. This was a refrain which G’d repeated to Moses and Aaron before every plague except the last one.

'ויחזק ה, every single time.