וַיֹּ֨אמֶר יְהוָ֜ה אֶל־מֹשֶׁ֗ה אֱמֹ֣ר אֶֽל־אַהֲרֹ֡ן קַ֣ח מַטְּךָ֣ וּנְטֵֽה־יָדְךָ֩ עַל־מֵימֵ֨י מִצְרַ֜יִם עַֽל־נַהֲרֹתָ֣ם ׀ עַל־יְאֹרֵיהֶ֣ם וְעַל־אַגְמֵיהֶ֗ם וְעַ֛ל כָּל־מִקְוֵ֥ה מֵימֵיהֶ֖ם וְיִֽהְיוּ־דָ֑ם וְהָ֤יָה דָם֙ בְּכָל־אֶ֣רֶץ מִצְרַ֔יִם וּבָעֵצִ֖ים וּבָאֲבָנִֽים׃
여호와께서 또 모세에게 이르시되 아론에게 명하기를 네 지팡이를 잡고 네 팔을 애굽의 물들과 하수들과 운하와 못과 모든 호수 위에 펴라 하라 그것들이 피가 되리니 애굽 온 땅에와 나무 그릇에와 돌 그릇에 모두 피가 있으리라
Midrash Tanchuma
And the Lord spoke unto Moses (Exod. 7:19). Scripture says elsewhere in allusion to this verse: Surely oppression turneth a wise man into a fool; and a gift destroyeth the understanding (Eccles. 7:7). Surely oppression turneth a wise man into a fool implies that when a wise man concerns himself with many matters, they confound his wisdom. And a gift destroyeth the understanding indicates that understanding of the Torah, which was placed as a gift in the heart of many (is destroyed). Oppression (osek) turneth a wise man into a fool implies that the scholar who occupies (ashak) himself (overmuch) with community problems forgets his learning. R. Johanan the son of Levi said: R. Judah the son of Pedayah taught me sixty laws concerning a grave which has been plowed over, and I have forgotten all of them because I occupied myself with the needs of the community. Hence, oppression turneth a wise man into a fool. Oppression turneth a wise man into a fool. The attention that Solomon devoted to insignificant matters led him astray. For it came to pass, when Solomon was old, that his wives turned away his heart with other gods (I Kings 11:4).
Shemot Rabbah
“Then you shall say to Aaron: Take your staff” – that is what is written: “The staff of Your strength the Lord will send from Zion” (Psalms 110:2). The Holy One blessed be He subjugates the wicked only with a staff. Why? It is because they are likened to dogs, as it is stated: “They return in the evening, they howl like a dog” (Psalms 59:15); just as it is the way of a dog to be beaten with a staff, so too, they are beaten. That is why it is stated: “The staff of Your strength” – the Holy One blessed be He said: Pharaoh is wicked. If he says to you: “Provide a wonder for you,” beat him with a staff, as it is stated: “Say to Aaron: Take your staff” (Exodus 7:19).
Shemot Rabbah
“The fish that are in the Nile will die and the Nile will become foul; and the Egyptians will loathe to drink water from the Nile. The Lord said to Moses: Say to Aaron: Take your staff, and stretch your hand over the water of Egypt, over their rivers, over their streams, and over their ponds, and over all their pools of water, and they will become blood; and there will be blood throughout the entire land of Egypt, and in the wood and in the stone vessels” (Exodus 7:18–19).
“The fish that are in the Nile will die.… The Lord said to Moses: Say to Aaron.” Rabbi Tanḥum said: Why was the water not afflicted by Moses? The Holy One blessed be He said to him: ‘The water that protected you when you were cast into the Nile, it is not appropriate for it to be afflicted by you. By your life, it will be afflicted only by Aaron.’
“Stretch your hand over the water of Egypt” – everything that was in the Nile, in the ponds, and in the rivers; “and over all their pools of water, and they will become blood” – [including water] that was in a jug; “and there will be blood throughout the entire land of Egypt” – even what an Egyptian spit was blood.
Why did the Holy One blessed be He bring blood upon them? It was measure for measure,14A punishment that fit the crime. as He said to Abraham: “The nation that they will serve I will judge…” (Genesis 15:14). It is because they did not allow Israelite women to immerse from their impurity, so they would not procreate; therefore, the water was afflicted with blood.15It is because they prevented the Israelite women from immersing to purify themselves from their menstrual blood. Consequently, it was prohibited for them to cohabit with their husbands.
“Moses and Aaron did so, as the Lord commanded; and he lifted the rod, and struck the water that was in the Nile, before the eyes of Pharaoh, and before the eyes of his servants; and all the water that was in the Nile turned into blood. The fish that were in the Nile died; and the Nile became foul, and the Egyptians could not drink water from the Nile; and the blood was throughout the land of Egypt” (Exodus 7:20–21).
“Moses and Aaron did so, as the Lord commanded.… The fish that were in the Nile died” – Rabbi Avin HaLevi, son of Rabbi, said: Israel became wealthy from the plague of blood. How so? If an Egyptian and an Israelite were in one house and the tub was full of water, and the Egyptian went to fill the jug from it, he would remove it filled with blood, but the Israelite would drink water from the tub. The Egyptian would say: ‘Give me a little water with your hand.’ He would give it to him, and it would become blood. He would say to him: ‘Let you and I drink water from one bowl,’ and the Israelite would drink water and the Egyptian blood. But when he would purchase it from the Israelite with money, he would drink water. From this, Israel became wealthy.
“The fish that are in the Nile will die.… The Lord said to Moses: Say to Aaron.” Rabbi Tanḥum said: Why was the water not afflicted by Moses? The Holy One blessed be He said to him: ‘The water that protected you when you were cast into the Nile, it is not appropriate for it to be afflicted by you. By your life, it will be afflicted only by Aaron.’
“Stretch your hand over the water of Egypt” – everything that was in the Nile, in the ponds, and in the rivers; “and over all their pools of water, and they will become blood” – [including water] that was in a jug; “and there will be blood throughout the entire land of Egypt” – even what an Egyptian spit was blood.
Why did the Holy One blessed be He bring blood upon them? It was measure for measure,14A punishment that fit the crime. as He said to Abraham: “The nation that they will serve I will judge…” (Genesis 15:14). It is because they did not allow Israelite women to immerse from their impurity, so they would not procreate; therefore, the water was afflicted with blood.15It is because they prevented the Israelite women from immersing to purify themselves from their menstrual blood. Consequently, it was prohibited for them to cohabit with their husbands.
“Moses and Aaron did so, as the Lord commanded; and he lifted the rod, and struck the water that was in the Nile, before the eyes of Pharaoh, and before the eyes of his servants; and all the water that was in the Nile turned into blood. The fish that were in the Nile died; and the Nile became foul, and the Egyptians could not drink water from the Nile; and the blood was throughout the land of Egypt” (Exodus 7:20–21).
“Moses and Aaron did so, as the Lord commanded.… The fish that were in the Nile died” – Rabbi Avin HaLevi, son of Rabbi, said: Israel became wealthy from the plague of blood. How so? If an Egyptian and an Israelite were in one house and the tub was full of water, and the Egyptian went to fill the jug from it, he would remove it filled with blood, but the Israelite would drink water from the tub. The Egyptian would say: ‘Give me a little water with your hand.’ He would give it to him, and it would become blood. He would say to him: ‘Let you and I drink water from one bowl,’ and the Israelite would drink water and the Egyptian blood. But when he would purchase it from the Israelite with money, he would drink water. From this, Israel became wealthy.