אַךְ־מְרִ֥י יְבַקֶּשׁ־רָ֑ע וּמַלְאָ֥ךְ אַ֝כְזָרִ֗י יְשֻׁלַּח־בּֽוֹ׃
רַק דער װידערשפּעניקער זוכט בײז, אָבער אַן אומדערבאַרימדיקער שָלִיח װעט אָנגעשיקט װערן אױף אים.
Midrash BeChiddush
24. “But HaShem hurled (vayina’er) the Egyptians….” (Ex. 14:24) Mekhilta: When one stirs up (yina’er) a pot, the ones on top go to the bottom and the ones on the bottom come up to the top. (God did this) in order to increase their agony. Another interpretation: God gave them the strength of youth in order that they continue to receive punishment. God did this for all the plagues so that they wouldn’t die from the plagues. Another: he put them in the hands of young and cruel angels, as Scripture states, “Therefore a cruel messenger shall be sent against him,” (Pro. 17:11) and “They die in their youth…” (Job 36:14) In Minchah Bilulah208Porto, Abraham Menahem ben Jacob ha-Kohen 1520 - after 1594, the author writes that since the people knew how to swim, he stirred up the water so that their feet were up and their heads were down, so they were unable to swim. I have written that he took some of them and stirred up others. How so? Pharaoh “took 600 of his picked chariots,” (Ex 14:7). He 216 of them to fight the powers of God’s great name, from the verses וַיִּסַּ֞ע “He traveled,” (Ex. 14:19), וַיָּבֹ֞א “He came” (Ex. 14:20), וַיֵּ֨ט “He stretched out his arm,” (Ex. 14:21) these add up to 216 letters, and שפ"ד, Shaf”ad.209Shapad, שפ"ד, adds up to 384 together with 216 they equal 600. Shapad is equal to the word Egypt if one adds the letters minus the letter yud. What did God do? First He killed the celestial prince of Egypt, as is stated, “Horse and driver He has hurled into the sea,” (Ex.15:1) This is written in the singular.210In other words, first God killed the one celestial prince of Egypt. First he lifted him high up and then cast him down into the abyss of the sea. Now all that remained were the lees, adding up to 215. All of them drowned in the Reed Sea, as is written, “Pharaoh’s chariots and his army He has cast into the sea.” (Ex 15:4) All that remained were שפ"ד who were called שפוד shippud, a skewer, that is, the thing that held them all together and served as a kind of skewer. God began to mix them up with the other 216 who were mentioned in the sea. It is written, “I will incite Egyptian against Egyptian…” (Is. 19:2) Mitzraim, Egypt, along with the letters in Gematria equals shapad (384) so that all of them were destroyed
Sforno
כי כספו הוא, and it is up to him to discipline him. Sometimes a slave’s insubordination continues until the master is forced to administer a strong blow. We have read of such in Proverbs 17,11 ומלאך אכזרי ישלח בואך מרי יבקש רע, “an evil man seeks to rebel; therefore a cruel messenger will be dispatched against him.”