Peninei Halakha

08. Kiyum

The Torah prohibits melakha on Shabbat only when the result is lasting (mitkayem). If it is not lasting, there is no Torah prohibition. Therefore, one who writes with a pencil or pen on paper transgresses a Torah prohibition, since this writing will last for a long time. However, if one writes with fruit juice whose color fades quickly, or on a leaf that will soon dry out and crumble, then the prohibition is rabbinic. Similarly, writing in sand or in the condensation on a window is rabbinically prohibited since it does not last (below 18:2, 4).

Along the same lines, one who ties a durable knot that will hold for an extended period of time transgresses a Torah prohibition, while one who ties a temporary knot that will not last long transgresses a rabbinic prohibition. A very loose knot that is easily undone and has absolutely no permanence, like a single knot or the knot of a tie, is not prohibited at all, since it is easily untied (below 13:13). The same applies to the melakha of Boneh: if one affixes a hook to the wall in a permanent way, he transgresses a Torah prohibition, while one who affixes it temporarily transgresses a rabbinic prohibition (below 15:3).

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Translated By:
Series Editor: Rabbi Elli Fischer

The Laws of Shabbat (1+2) - Yocheved Cohen
The Laws of Prayer - Atira Ote
The Laws of Women’s Prayer - Atira Ote
The Laws of Pesach - Joshua Wertheimer
The Laws of Zemanim - Moshe Lichtman

Editor: Nechama Unterman