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Sidrah

Parashah of the week: Bo

“Moses said, ‘Thus says the Eternal One: Toward midnight I will go forth among the Egyptians…’” Exodus 11:4

January 31, 2025 09:29
Supermoon Getty 452088304
Supermoon, or perigee moon, rising behind Mount Wilson Observatory in California in 2024 (Photo: Getty Images)

In this verse foretelling the tenth plague, we learn when it is to take place: kachatzot, “at (or toward, or around) midnight”. But a chapter later we find it occurred bachatzi halaylah, “in the middle of the night’”(12:29).

Are these just different ways of saying the same thing? "In the middle of the night” seems rather vague, whereas perhaps “midnight” is a precise moment.

The medieval bible commentators compare the two terms, chatzot and chatzi halaylah, but Ibn Ezra makes an additional comment about the time. He notes the difficulty of knowing exactly when midday occurs, but that the precise moment of midnight is even harder to discern.

Ibn Ezra, who lived in the early 12th century, was a Bible commentator, poet and a grammarian, but here his science is pretty good too. In theory, midday is when the sun is at its highest point in the sky. Ignoring the fact that if the sun is directly overhead for you – what you might call “noon” – then a few miles west of you it won’t be noon by that definition for another minute, at least something notionally happens at midday, when shadows are shortest.

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