וַיַּֽעֲשׂוּ־כֵן֩ מֹשֶׁ֨ה וְאַהֲרֹ֜ן כַּאֲשֶׁ֣ר ׀ צִוָּ֣ה יְהוָ֗ה וַיָּ֤רֶם בַּמַּטֶּה֙ וַיַּ֤ךְ אֶת־הַמַּ֙יִם֙ אֲשֶׁ֣ר בַּיְאֹ֔ר לְעֵינֵ֣י פַרְעֹ֔ה וּלְעֵינֵ֖י עֲבָדָ֑יו וַיֵּהָֽפְכ֛וּ כָּל־הַמַּ֥יִם אֲשֶׁר־בַּיְאֹ֖ר לְדָֽם׃
E Moshe e Aharon fizeram conforme o Eterno ordenou, e levantou a vara e feriu as águas que estavam no rio, à vista do Faraó e à vista dos seus servos, e todas as águas que estavam no rio se transformaram em sangue.
On Dreams
[259] Thus our investigation has shewn what was meant when the speech which deserves praise was compared to a river. It follows that speech which calls for censure was none other than the river of Egypt—speech, that is, which is ill-trained, ignorant and practically soulless. And therefore it changes into blood (Ex. 7:20), since it cannot provide nourishment, for the speech of indiscipline none can drink. And further it is prolific of frogs, bloodless, soulless creatures, whose cry is a strange harsh noise, painful to the hearers.