Ezekiel 5:1יחזקאל ה׳:א׳
And thou, Son of man, take a sharp knife; a barber’s razor take for thyself; and pass it over thy head, and over thy beard: then take balances to weigh, and divide the hair.
וְאַתָּ֨ה בֶן־אָדָ֜ם קַח־לְךָ֣ ׀ חֶ֣רֶב חַדָּ֗ה תַּ֤עַר הַגַּלָּבִים֙ תִּקָּחֶ֣נָּה לָּ֔ךְ וְהַעֲבַרְתָּ֥ עַל־רֹאשְׁךָ֖ וְעַל־זְקָנֶ֑ךָ וְלָקַחְתָּ֥ לְךָ֛ מֹאזְנֵ֥י מִשְׁקָ֖ל וְחִלַּקְתָּֽם׃
"The vestibular system has been a mystery for centuries. Although the anatomy of the discovery of the vestibular apparatus dates to the Renaissance era (c.1400 - c.1600), its function and physiology were a mystery until the middle of the 19th century (Hachmeister, 2003)."
https://canadianaudiologist.ca/a-glimpse-into-the-history-of-vestibular-testing/
Ecclesiastes 12:9קהלת י״ב:ט׳
A further word: Because Koheleth was a sage, he continued to instruct the people. He listened to and tested the soundness of many maxims.
וְיֹתֵ֕ר שֶׁהָיָ֥ה קֹהֶ֖לֶת חָכָ֑ם ע֗וֹד לִמַּד־דַּ֙עַת֙ אֶת־הָעָ֔ם וְאִזֵּ֣ן וְחִקֵּ֔ר תִּקֵּ֖ן מְשָׁלִ֥ים הַרְבֵּֽה׃
Ibn Ezra on Ecclesiastes 12:9:2אבן עזרא על קהלת י״ב:ט׳:ב׳
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