Yerushalmi Yomi · Beginner – Jewish Basics · On-Ramp

Jerusalem Talmud Nedarim 6:4:2-8:1

On-RampBeginner – Jewish BasicsNovember 15, 2025

Ever feel like you've said "no" to something, only to realize there are sneaky loopholes?

You know that feeling? You declare, "I'm never eating chocolate again!" and then suddenly, chocolate cake, chocolate chip cookies, or even a chocolate-flavored latte seem to appear everywhere. It's like the universe is testing your resolve! Well, our ancient Jewish texts have been grappling with this exact kind of situation for centuries. Today, we're going to dive into a fascinating discussion from the Jerusalem Talmud about vows, and how the precise wording can make all the difference. We'll discover that sometimes, saying "no" to one thing might still leave the door open to something very similar, and explore the wisdom behind these ancient distinctions.

Context

  • Who: This text is part of the Jerusalem Talmud, a foundational collection of Jewish law and discussion compiled by scholars in the land of Israel. It features rabbis like Rebbi Yose, Abba Shaul, Rebbi Simeon, and Rebbi Joshua, who lived and debated in ancient times.
  • When: The Jerusalem Talmud was primarily compiled between the 2nd and 5th centuries CE, building upon centuries of oral tradition and earlier written works.
  • Where: The discussions took place in centers of Jewish learning in the Land of Israel, like the ancient academies.
  • Key Term: Vow (Neder): In Jewish tradition, a vow is a solemn promise made to God, dedicating something to God or prohibiting oneself from using or doing something. These vows are taken very seriously.

Text Snapshot

The rabbis are discussing vows, and specifically, what happens when someone vows not to consume something. The Mishnah (our core text) says:

"If somebody vows not to drink milk, he is permitted curd... But from curd, he is permitted milk. Abba Shaul says, if he vows not to have cheese, it is forbidden to him whether salted or unsalted."

Then, the Halakhah (the explanation) delves deeper:

"What is curd? Curdled milk. What is the reason of Rebbi Yose? The name of its father is called over it. In the opinion of Rebbi Yose, is one who vows not to taste wine permitted cooked wine? ... ‘This is the rule Rebbi Simeon declared in the name of Rebbi Joshua: For everything that may become permitted through some action... the Sages did not fix any limits, but a kind with its own is forbidden in the minutest amount, a kind with a different kind if it can be tasted.'"

This is followed by a long discussion about how vows interact with things that can change form or become mixed with other substances. The core idea is that the exact nature of the forbidden item and its derivatives matters immensely.

Close Reading

Insight 1: The Devil is in the Dairy Details (and Other Food Groups!)

The very first example is about milk. If you vow "no milk," the rabbis discuss whether you can have "curd." Rebbi Yose says yes, because curd is essentially curdled milk, and its name still points back to "milk." This is a bit like saying you've vowed off "bread" but can still eat "toast" – the fundamental thing is still there!

However, the commentators explain that curd is the liquid that separates from milk when making cheese. So, if you vow "no milk," you can have the byproduct (curd) because it's not strictly milk anymore. But if you vow "no curd," you can have milk. It’s like a linguistic and culinary detective story! The key takeaway here is that Jewish law often cares about the specific form and origin of things. Vows are interpreted very precisely, not loosely. This encourages us to be mindful of our words, even in everyday promises.

Insight 2: The "Derivative" Dilemma

The text then expands this idea to other foods. If you vow not to eat grapes, you might be permitted to drink wine made from them. If you vow not to eat olives, you might be permitted to use olive oil. Why? Because wine is a derivative of grapes, and oil is a derivative of olives. They are related, but not the exact same thing.

Rebbi Jehudah ben Bathyra has a different take, suggesting that if you forbid something named by its derivative (like saying "no honey" when you mean "no dates," since dates are often called honey), then the derivative is also forbidden. But the Sages generally permit the derivative unless you are super specific in your vow. This teaches us about the importance of clear communication. When we make promises or set boundaries, being as clear as possible prevents misunderstandings and unintended consequences. It's a reminder that our words have power and can create real-world permissions or prohibitions.

Insight 3: The "Can it Become Permitted?" Principle

A significant part of the discussion revolves around whether something forbidden can "become permitted through some action." For example, if you vow not to eat terumah (a portion of produce set aside for Kohanim, priests), and it gets mixed with other produce, it remains forbidden because terumah can never "become permitted" to a non-priest. It's inherently holy and has specific rules.

But with other things, like certain tithes or even grain that has a specific status, there are actions that can change its status. The rabbis are debating how vows interact with these situations. If something can change its status (like through annulment by a rabbi, or by becoming unrecognizable), then a vow might be interpreted differently. This teaches us a valuable lesson about flexibility and understanding. Life is rarely black and white. Things change, situations evolve, and sometimes, what seemed forbidden can become permissible under new circumstances or with a different approach. It encourages us to look for possibilities and not get stuck in rigid thinking.

Apply It

Your 60-Second Vow Challenge:

This week, try this tiny practice: For 60 seconds each day, think about a small, everyday "vow" you make to yourself. Maybe it's "I'll drink more water," "I'll put my phone away during dinner," or "I'll read for 10 minutes."

As you think about it, ask yourself:

  • Is my promise clear? Could there be a loophole I'm not seeing?
  • What's the exact thing I'm committing to? (e.g., "water," not just "liquid")
  • How can I make this commitment even clearer if I were to write it down formally?

Just a minute a day of mindful reflection on your personal commitments can help you appreciate the precision the rabbis are discussing!

Chevruta Mini (Study Buddy Time!)

Imagine you vowed, "I will not eat any fruit."

  1. Based on our text, would you be permitted to drink fruit juice? Why or why not?
  2. What's one common, everyday promise you make, and how could you make it clearer using the principles we discussed today?

Takeaway

Remember this: In Jewish tradition, the precise wording of promises and prohibitions matters, guiding us toward greater clarity and mindful living.