וַיֹּ֤אמֶר יְהוָה֙ אֶל־מֹשֶׁ֔ה נְטֵ֥ה אֶת־יָדְךָ֖ עַל־הַיָּ֑ם וְיָשֻׁ֤בוּ הַמַּ֙יִם֙ עַל־מִצְרַ֔יִם עַל־רִכְבּ֖וֹ וְעַל־פָּרָשָֽׁיו׃
And the LORD said unto Moses: ‘Stretch out thy hand over the sea, that the waters may come back upon the Egyptians, upon their chariots, and upon their horsemen.’
Read kabbalistic (mystical) interpretation of Exodus 14:26: and classical mystical sources.