And with this, the reason for Rashi's words on the verse "And there shall be blood throughout all the land of Egypt" – "even in the bathhouses and baths in the homes" – will be well understood. At first glance, it is surprising, what is the significance of the bathhouses and baths that the Torah went out of its way to specify them explicitly? Indeed, according to our explanation, that the primary reason for striking all the waters of Egypt was because of the spilling of the blood of Israel, it is well understood. For behold, many of the spilled blood of Israel were used to bathe the leprous body of Pharaoh, as known from the words of the Midrash (Shemot Rabbah, Parashat 1, Siman 34): "The magicians of Egypt said, you have no cure unless we slaughter 150 of the young of Israel in the evening and 150 in the morning, and you will bathe in their blood twice a day." Therefore, it is fitting that now, when the time of retribution has arrived, these bathhouses will not escape the plague but will also be struck by blood, measure for measure. Thus, it is of great importance to emphasize this matter, and therefore the Torah went out of its way to specify this explicitly. And I found support for this in the words of R"Sh (brought in Tosafot HaShalem, Gliss, verse 17, letter y), this is his wording: since he bathed his body in the blood of the children of Israel, therefore he was struck with blood. So it ends.