וּמֹשֶׁ֣ה וְאַהֲרֹ֗ן עָשׂ֛וּ אֶת־כָּל־הַמֹּפְתִ֥ים הָאֵ֖לֶּה לִפְנֵ֣י פַרְעֹ֑ה וַיְחַזֵּ֤ק יְהוָה֙ אֶת־לֵ֣ב פַּרְעֹ֔ה וְלֹֽא־שִׁלַּ֥ח אֶת־בְּנֵֽי־יִשְׂרָאֵ֖ל מֵאַרְצֽוֹ׃ (פ)
摩西和亞倫在法老面前行了這一切奇蹟。永恆者卻使法老的心剛硬，他就不讓以色列人離開他的國。
Rashi
ומשה ואהרן עשו וגו׳ AND MOSES AND AARON DID etc. — It (Scripture) has already written this in the description of all the preceding wonders, and it repeats it here only in order to connect it with the chapter which comes after this (as giving a reason why the commands in the next chapter were given to Aaron as well as to Moses; cf. Rashi’s comment on the following verse).
Ramban
AND MOSES AND AARON DID ALL THESE WONDERS. These are the wonders mentioned above. Scripture states this now because it completes [the narrative of] all the deeds they did [before Pharaoh], including the decree of the plague of the firstborn of which they already informed Pharaoh, for in the actual slaying of the firstborn, Moses and Aaron had no part.