סימן צ סעיף א
יֵשׁ דְּבָרִים שֶׁהֵן אֲסוּרִין בַּשַׁבָּת, אַף עַל פִּי שֶׁאֵינָן דּוֹמִין לִמְלָאכָה וְאֵינָם מְבִיאִין לִידֵי מְלָאכָה. וּמִפְּנֵי מַה נֶּאֶסָרוּ. מִשּׁוּם שֶׁנֶּאֱמַר, אִם תָּשִׁיב מִשַׁבָּת רַגְלֶיךָ עֲשׂוֹת חֲפָצֶךָ בְּיוֹם קָדְשִׁי וְגוֹ', וְכִבַּדְתּוֹ מֵעֲשׂוֹת דְּרָכֶיךָ מִמְּצוֹא חֶפְצְךָ וְדַבֵּר דָּבָר. מֵהָא דִּכְתִיב, "וְכִבַּדְתּוֹ מֵעֲשׂוֹת דְּרָכֶיךָ" דָּרְשׁוּ רַבּוֹתֵינוּ זִכְרוֹנָם לִבְרָכָה, שֶׁלֹּא יְהֵא הִלּוּכְךָ בַּשַׁבָּת כְּהִלּוּכְךָ בַּחֹל. לְפִיכָךְ אָסוּר לָרוּץ בַּשַׁבָּת. אֲבָל לִדְבַר מִצְוָה, מֻתָּר לָרוּץ, (מִדִּכְתִיב דְּרָכֶיךָ, מַשְׁמַע, דְּרָכֶיךָ אֲסוּרִים, אֲבָל דַּרְכֵי שָׁמַיִם מֻתָּרִין) וּמִצְוָה לָרוּץ (עַיֵן לְעֵיל סִימָן י"ב סָעִיף יא) (סִימָן צ' ש"א).
Some things are forbidden [to do] on Shabbos, although they are [in no way] similar to a melachah, nor [is there a chance] that they will cause a melachah. Then, why were they forbidden? Because it is said1Isaiah 58: 13. "If you will refrain from walking on Shabbos2I.e. if because of Shabbos you were prevented from walking more than the allotted distance. [or from] doing your needs on My holy day," and [the verse goes on to] say: "and you will honor it [the day] by not doing your own needs [literally: "your ways"], or from pursuing your needs,3It is clear that the verse is referring to actions that are not specifically melachos. or from speaking anything.4See paragraph 4. From the words: "And you will honor it by not doing your own ways," our Sages,5Maseches Shabbos 113a. of blessed memory, inferred that your walking on Shabbos [should be different] from the weekdays. Therefore, it is forbidden to run on Shabbos.6Running for pleasure as youngsters do is permitted. [Shulchan Aruch 301: 2] It is permitted to jump over a puddle or to run to get out of the rain. [Shulchan Aruch Harav, Minchas Shabbos] However, for the purpose of a mitzvah it is permitted to run. ([This is inferred] because it states "your ways"; which implies that your own ways [or needs] are prohibited, but the needs of Heaven are permitted) and for them it is your duty to run.
תנא דבי אליהו כל השונה הלכות בכל יום מובטח לו שהוא בן העולם הבא שנאמר הליכות עולם לו אל תקרי הליכות אלא הלכות (נדה ע"ג.)