אָמַ֜רְתִּי אַךְ־תִּירְאִ֤י אוֹתִי֙ תִּקְחִ֣י מוּסָ֔ר וְלֹֽא־יִכָּרֵ֣ת מְעוֹנָ֔הּ כֹּ֥ל אֲשֶׁר־פָּקַ֖דְתִּי עָלֶ֑יהָ אָכֵן֙ הִשְׁכִּ֣ימוּ הִשְׁחִ֔יתוּ כֹּ֖ל עֲלִילוֹתָֽם׃
내가 이르기를 너는 오직 나를 경외하고 교훈을 받으라 그리하면 내가 형벌을 내리기로 정하기는 하였거니와 너의 거처가 끊어지지 아니하리라 하였으나 그들이 부지런히 그 모든 행위를 더럽게 하였느니라
Rashi
ואני אקשה AND I WILL ALLOW [PHARAOH’S HEART] TO HARDEN — Since he has wickedly resisted Me, and it is manifest to Me that the heathen nations find no spiritual satisfaction in setting their whole heart to return to Me penitently, it is better that his heart should be hardened in order that My signs may be multiplied against him so that ye may recognise My divine power. Such, indeed, is the method of the Holy One, blessed be He: He brings punishment upon the nations so that Israel may hear of it and fear Him, as it is said, (Zephaniah 3:6, 3:7) “I have cut off nations, their corners are desolate etc. … I said: Surely thou wilt fear Me, thou wilt receive correction” (cf. Yevamot 63a). Nevertheless, in the case of the first five plagues it is not stated, “The Lord hardened Pharaoh’s heart” but “Pharaoh’s heart was hardened” (Midrash Tanchuma, Vaera 3).