וְלָ֤מָּה תְכַבְּדוּ֙ אֶת־לְבַבְכֶ֔ם כַּאֲשֶׁ֧ר כִּבְּד֛וּ מִצְרַ֥יִם וּפַרְעֹ֖ה אֶת־לִבָּ֑ם הֲלוֹא֙ כַּאֲשֶׁ֣ר הִתְעַלֵּ֣ל בָּהֶ֔ם וַֽיְשַׁלְּח֖וּם וַיֵּלֵֽכוּ׃
애굽인과 바로가 그 마음을 강퍅케 한 것 같이 어찌하여 너희가 너희 마음을 강퍅케 하겠느냐 그가 그들 중에서 기이하게 행한 후에 그들이 백성을 가게 하므로 백성이 떠나지 아니하였느냐
Rashi
התעללתי means I HAVE MOCKED, as in, (Numbers 22:29) “Because thou hast mocked (התעללת) me”; (I Samuel 6:6) “Indeed, when he mocked (התעולל) them”, which, also, is said in reference to Egypt. It is not an expression denoting doing and action, for were this so it should have written עוללתי, similar to (Lamentations 1:22) “And do (עולל) unto them as thou hast done (עוללת) unto me”, and to (Lamentations 1:12) “which he has done (עולל) unto me”.
Rabbeinu Bahya
וידעתם כי אני ה', “so that you will realise that I am Hashem.” Not only for a brief period of time, but throughout the generations. The lessons learned from what happened in Egypt to the Egyptians served the people of Israel for hundreds of years as a reminder of G’d’s power. Even the Gentile nations were impressed and accepted the lesson. We find this reflected in Samuel I 6,6: (after the ark had been captured by the Philistines but had spread disease and disaster in their land the priests of the Philistines speaking to their countrymen) “Do not harden your hearts as the Egyptians and Pharaoh hardened their hearts. As you know, when He made a mockery of them, they had to let Israel go and they departed.”
It is possible to explain the word התעללתי, as being derived from עילה, cause, pretext. Most actions performed in this terrestrial world are described as עלילות. We refer you to Psalms 105,1 הודיעו בעמים עלילותיו, “acquaint the nations with His deeds.” We have a similar meaning of the word in Samuel I 2,3 (Chanah speaking) כי א-ל דעות ה' ולא(ו) נתכנו עלילות, “for the Lord is an all-knowing G’d; by Him actions are measured.” Onkelos also translates our verse here in this manner writing ית נסין די עבידת במצרים, “the miracles You performed in Egypt.” David also refers to G’d’s deeds as עלילות in Psalms 66,5 “who is held in awe by men for His acts.” The reason that G’d’s activities are referred to by a word which hints at עילה is that He is the prime Cause of everything which transpires. All His actions have been inspired by His original planning when He created the universe and man.
It is possible to explain the word התעללתי, as being derived from עילה, cause, pretext. Most actions performed in this terrestrial world are described as עלילות. We refer you to Psalms 105,1 הודיעו בעמים עלילותיו, “acquaint the nations with His deeds.” We have a similar meaning of the word in Samuel I 2,3 (Chanah speaking) כי א-ל דעות ה' ולא(ו) נתכנו עלילות, “for the Lord is an all-knowing G’d; by Him actions are measured.” Onkelos also translates our verse here in this manner writing ית נסין די עבידת במצרים, “the miracles You performed in Egypt.” David also refers to G’d’s deeds as עלילות in Psalms 66,5 “who is held in awe by men for His acts.” The reason that G’d’s activities are referred to by a word which hints at עילה is that He is the prime Cause of everything which transpires. All His actions have been inspired by His original planning when He created the universe and man.
Ibn Ezra
I also will choose, etc. בתעלוליהם Their charges.7A. V., Their delusions. Occasions.7A. V., Their delusions. Occasions. Comp. עלילות charges (Deut. 22:17), their charges are the charges brought against them. It may also be rendered their delusions; comp. ויתעללו and they abused (Judg. 19:25); התעולל he mocked (1 Sam. 6:6).8A. V., He had wrought wonderfully.