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.
"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.
Ibn Ezra on Ecclesiastes 12:9:2אבן עזרא על קהלת י״ב:ט׳:ב׳
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