פרשת וארא תשכ"ב - מכות דם וצפרדע

שבעת ימים, this was the duration of the plague that struck the river. ויאמר ה' אל משה בא אל פרעה, Moses warned Pharaoh twice before a plague materialised, whereas before the third plague he did not give any warning. This remained the pattern throughout all the plagues which occurred in groups of three. Before the plague of blood and frogs Pharaoh was warned, not so before the vermin. Before the plague of free roaming beasts and pestilence Moses extended a warning, whereas he did not warn Pharaoh of the plague of boils and carbuncles. Pharaoh was warned both before the hail and the locust, whereas the plague of darkness occurred without prior warning.

Get thee unto Pharaoh in the morning; lo, he goeth out unto the water; and thou shalt stand by the river’s brink to meet him; and the rod which was turned to a serpent shalt thou take in thy hand.

thus saith the LORD: In this thou shalt know that I am the LORD—behold, I will smite with the rod that is in my hand upon the waters which are in the river, and they shall be turned to blood.

ונהפכו לדם AND THEY SHALL BE TURNED INTO BLOOD — Because rain does not fall in Egypt but the Nile rises and irrigates the land and the Egyptians on this account worshipped the Nile, therefore God first smote their deity and afterwards smote them (Exodus Rabbah 9:9).

And all the Egyptians digged round about the river for water to drink; for they could not drink of the water of the river.

ויחזק לב פרעה AND PHARAOH’S HEART WAS HARDENED so that he said: You are doing this by witchcraft: “You are bringing straw to Afarayim”— a city that is full of straw; thus you bring sorcery to Egypt, a land that is full of sorcery (Menachot 85a; Exodus Rabbah 9:6-7).

גם לזאת [NEITHER DID HE SET HIS HEART] TO THIS ALSO — to the wonder of the staff which was changed into a serpent and also not to that of the blood.

ואם מאן אתה — AND IF THOU BE A REFUSER. מאן — The word has the same meaning as ממאן, refusing, (the Piel participle) only the difference is that it is a description of a person having reference to the action he always does (i. e. it is an adjective and the full phrase would be איש מאן) similar to שָׁלֵו “a man at ease” (Job 16:12); שָׁקֵט “a man at ease” (Jeremiah 48:11); וְזָעֵף [‎סר] “a man displeased” (1 Kings 20:43), whilst מְמאֵן merely describes the person as refusing at some particular moment.

נגף את כל גבולך I WILL PLAGUE ALL THY BOUNDARIES — נוגף means smiting. So, too, wherever a form from the root נגף occurs, it does not necessarily denote killing but it may mean merely smiting. Similarly, (Exodus 21:22) “and if they hurt (ונגפו) a woman with child”, does not mean they kill (as the context shows); so, too, (Jeremiah 13:16) “and before your feet stumble (יתנגפו)” (i. e. hit against something); (Psalms 91:12) “lest thou dash (תגף) thy foot against a stone”; (Isaiah 8:14) ”and for a stone of stumbling (נגף)‎”.

בביתך — first into thine house and afterwards, בבית עבדיך — into the house of thy servants; he took the first step in counselling evil against Israel, as it is stated (1:9) “He spake to his people, “[Behold, the children of Israel are more numerous and powerful than we]”, and with him, therefore, did punishment begin (cf. Sotah 11a and Exodus Rabbah 10:3).