כִּ֣י ׀ בַּפַּ֣עַם הַזֹּ֗את אֲנִ֨י שֹׁלֵ֜חַ אֶת־כָּל־מַגֵּפֹתַי֙ אֶֽל־לִבְּךָ֔ וּבַעֲבָדֶ֖יךָ וּבְעַמֶּ֑ךָ בַּעֲב֣וּר תֵּדַ֔ע כִּ֛י אֵ֥ין כָּמֹ֖נִי בְּכָל־הָאָֽרֶץ׃
내가 이번에는 모든 재앙을 네 마음과 네 신하와 네 백성에게 내려 너로 온 천하에 나와 같은 자가 없음을 알게 하리라
Rashi
את כל מגפתי [FOR I WILL THIS TIME SEND] ALL MY PLAGUES — We may gather from this that the plague on the first ripe ears outweighed all the previous plagues.
Chizkuni
את כל מגפותי, “all My plagues;” according to Rashi what we are to learn from this verse (“all My plagues”) is that the plague of killing the Egyptians’ firstborns is considered as equivalent to all the plagues. [There are different errors in different manuscripts of Rashi, as a result of which it is not clear whether Rashi spoke about the plague of hail, or the last group of plagues commencing with hail and concluding with the slaying of the firstborn. I will not speculate, therefore [I omit speculations quoted by the author also. Ed.]
Rashbam
מגפותי, different damage causing plagues, such as fire, hail, and brimstones, snow and heavy smoke.