Tafsiran Yesaya 44:18: Ibn Ezra & Tze'enah Ure'enah

לֹ֥א יָדְע֖וּ וְלֹ֣א יָבִ֑ינוּ כִּ֣י טַ֤ח מֵֽרְאוֹת֙ עֵֽינֵיהֶ֔ם מֵהַשְׂכִּ֖יל לִבֹּתָֽם׃

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Ibn Ezra

לא ידעו ולא יבינו They have not known nor understood. The seat of knowledge (רעת) is in those cavities of the brain that are nearer to the forehead; the understanding (בינה) is in the middle one, that is also in the middle of the head.29In his remark on Ex. 31:3, I. E. explains the three expressions ,חכמה ,תבונה, דעת to signify the receptive, discriminative and reproductive faculties of our mind, and assigns to each of them its special place in the brain.
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Ibn Ezra

טח He hath shut. Comp. וטח and he shall plaister (Lev, 14:42); it is a transitive verb; the Lord is understood as the subject to it.
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Ibn Ezra

עיניהם Their eyes. The eye of each of them; this construction is not at all rare.30As to the explanation of it, see I. E. on 2:11, Note 18.
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