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Who knows three hundred forty eight?

שמונה וארבעים ושלוש מאות - מי יודע?‏

The traditional Passover song "Echad - mi yodeya" implies a possible presupposition that there is a Jewish significance to be found for each natural number. Accordingly, there is an ongoing series on Mi Yodeya that is attempting to unearth significant Judaism facts about each number, in sequence.

What significant Judaism facts are there about the number 348? The more significant within Judaism and the more intrinsically dependent on the value 348, the stronger the answer. Please include sources for your information wherever possible, as with all other answers on this site.

NO GEMATRIAS!

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348 are the negative commandments as enumerated in the Introduction to Halachot Gedolot:

אילו מאתים ושבעים ושבעה לאוין ושבעים ואחת עבירות שבמיתות ששה ענשים הרי אלו שלש מאות וארבעים ושמונה מצות לא תעשה

These are the 277 prohibitions, plus the 71 sins that [incur] the six punishments; behold these are the 348 negative commandments.

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348 are the days of the year one is permitted to eat in a kesidran non-leap year (354 minus the 6 fast days (the five derabban and Yom Kippur) equals 348.

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  • Do you realize that most years don't have 354 days?
    – Double AA ♦
    Mar 5, 2019 at 13:48
  • This doesn’t account for תענית בכורות. Perhaps this should be emended to read “on which a non-firstborn is permitted to eat.”
    – DonielF
    Mar 5, 2019 at 17:04
  • @DonielF As a bechor myself, I always make a siyum. If you find me even one bechor who fasts, I'll emend the answer.
    – TheAsh
    Mar 5, 2019 at 22:04
  • @TheAsh Making a siyum is a "cheat" which many bechoros do (while I'm not a bechor, the bechoros in my family partake in such a siyum). The base halacha is that a bechor must fast on Erev Pesach; a siyum is merely a way out of it.
    – DonielF
    Mar 5, 2019 at 22:06
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    @DonielF No, it's not a cheat. It works only because it's not a real fast - it's merely a minhag.
    – TheAsh
    Mar 6, 2019 at 12:11
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348 are the days where it is permitted to own Chametz in Israel (including partial days). (In a shaleim non-leap year.)

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