וַיִּ֣פֶן פַּרְעֹ֔ה וַיָּבֹ֖א אֶל־בֵּית֑וֹ וְלֹא־שָׁ֥ת לִבּ֖וֹ גַּם־לָזֹֽאת׃
And Pharaoh turned and went into his house, neither did he lay even this to heart.
Read kabbalistic (mystical) interpretation of Exodus 7:23: and classical mystical sources.