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    Chapter 2 · The 39 Avot Melakhot

    Borer - deep dive into the most frequent melakhah

    Lesson 16 of 28 28 min

    Borer is the melakhah every learner meets most often. Three classic distinctions: food from waste (forbidden) / waste from food (forbidden), with vessel / by hand, immediate / for later. Master the three.

    Lesson goals
    • 01Recite the three borer distinctions
    • 02Apply to 5 test cases: fruit, salad, nuts, dishes, playlist tracks
    • 03Understand SA (OC 319) vs. Mishnah Berurah
    01

    Building the Foundation: What is 'Borer'?

    The melakhah of Borer is one of the thirty-nine forbidden labors on Shabbat. It involves separating a mixture of two or more types, where we separate the 'desired' from the 'undesired'. This is a fundamental melakhah that appears in our daily lives frequently, and therefore, understanding it is crucial for proper Shabbat observance.

    משנה שבת ז, ד
    הבורר אוכל מתוך פסולת, חייב. פסולת מתוך אוכל, חייב. אוכל מתוך אוכל, אם הוא מין אחד – פטור. שני מינים – חייב.

    One who separates food from waste is liable. Waste from food is liable. Food from food, if it is one type – exempt. Two types – liable.

    Insight

    The Mishna presents us with the basic principle: any act of separating different components in a mixture, where we choose the desired and remove the undesired, is a potential for Borer. The key is 'mixture' and 'separation'.

    תערובתTa'aroves
    Two or more types mixed together, such as food and waste, or two different types of food.
    02

    The Three Pillars of Permitted Borer

    To permit a separation act on Shabbat, we must ensure it meets three essential conditions. If even one is missing, the act is forbidden. These are our 'tools' for navigating this melakhah.

    1. 1Separating food from waste (or waste from food) – forbidden.
    2. 2Separating by hand and not with a utensil specifically designed for sifting/separating.
    3. 3Separating immediately, meaning for immediate consumption, and not for later use.
    Insight

    Note: Unlike other melakhot, in Borer we look for the conditions of permission. Separation itself is a forbidden act, and these conditions 'remove' it from the prohibition. This is an inverse but important thought pattern.

    לאלתרLe'alter
    Immediately, for immediate use. In Borer, this means for eating or using at the same meal/time.
    03

    Case Analysis: Food from Waste or Waste from Food?

    The first and most crucial distinction is what we are lifting. If we lift the 'food' from the 'waste' – this is a Borer act forbidden Biblically. If we lift the 'waste' from the 'food' – this is also a Borer act forbidden Biblically. What is permitted is only to leave the food in its place and remove the waste from its side, or to take the food along with a little waste.

    שולחן ערוך אורח חיים שיט, א
    והוא שיברור אוכל מתוך פסולת, אבל אם בורר פסולת מתוך אוכל, חייב. וכיצד יעשה? נוטל אוכל בידו ואוכל, ומניח פסולת.

    And that is if he separates food from waste, but if he separates waste from food, he is liable. So how should he do it? He takes food in his hand and eats, and leaves the waste.

    Kushya

    If both separating food from waste and waste from food are forbidden, what is the difference between them? And what exactly is permitted?

    Terutz

    The Shulchan Aruch explains that the prohibition is on the act of 'B'rira' – active separation. The permission is to take the food that is suitable for eating, even if there is waste around it, and not to perform an act of cleaning or improving the mixture.

    אוכלOchel
    The desired and good part of the mixture, that which one wants to eat or use.
    04

    Applying the Halakha: Utensils and Immediacy

    The two additional conditions for permission are 'by hand' and 'immediately'. It is forbidden to separate with a utensil specifically designed for separation (like a strainer or sieve), but only by hand. Also, it is permitted to separate only if the food is needed immediately, at that same meal. If one separates for a later meal, or for storage, this is a complete melakhah of Borer.

    משנה ברורה שיט, סעיף קטן ב
    כל הבורר אוכל מתוך פסולת, בין ביד בין בכלי, חייב. ואם בורר פסולת מתוך אוכל, בין ביד בין בכלי, חייב. וכיצד יעשה? נוטל אוכל בידו ואוכל, ומניח פסולת. וכל זה אינו מותר אלא לאלתר.

    Anyone who separates food from waste, whether by hand or with a utensil, is liable. And if he separates waste from food, whether by hand or with a utensil, he is liable. So how should he do it? He takes food in his hand and eats, and leaves the waste. And all this is only permitted for immediate use.

    Insight

    The Mishnah Berurah emphasizes the importance of these rules. Even if you separate 'food from waste' (which we already learned is forbidden), if you did so with a utensil or not immediately, you added severity to the prohibition. The goal is to prevent any action resembling professional sifting.

    כלי ברירהKli Brira
    A utensil specifically designed for separation, such as a strainer, sieve, or tongs intended for sifting.
    Practice

    Describe a Shabbat meal. Mark 3 moments borer may arise. Suggest a solution for each.

    Lesson wrap-up

    Borer is the real test - master it, and you master practical halakha.

    Check your understanding

    Test yourself before marking the lesson complete.

    Question 1 of 4

    A person is served a fruit salad. It contains apple and kiwi pieces. He doesn't like kiwi, so he removes all the kiwi pieces from his plate. Does he violate the prohibition of Borer?

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