סימן פח סעיף ט
כְּשֵׁם שֶׁאָסוּר לְטַלְטֵל אֶת הַמֻּקְצֶה אוֹ אֶת הַנּוֹלָד, כָּךְ אָסוּר לִתֵּן כְּלִי תַּחְתֵּיהֶן כְּדֵי שֶׁיִּפְּלוּ לְתוֹכוֹ, כֵּיוָן שֶׁעַל יְדֵי זֶה הוּא מְבַטֵּל אֶת הַכְּלִי שֶׁלֹּא יוּכַל לְטַלְטְלוֹ עוֹד, וַהֲרֵי זֶה כְּאִלּוּ חִבְּרוֹ שָׁם בְּטִיט, אֲבָל מֻתָּר לִכְפּוֹת סַל לִפְנֵי הָאֶפְרוֹחִים כְּדֵי שֶׁיַּעֲלוּ וְיֵרְדוּ בּוֹ, כִּי לְאַחַר שֶׁלֹּא יִהְיוּ עָלָיו, מֻתָּר לְטַלְטְלוֹ. וְאִם הָיוּ עָלָיו בֵּין הַשְּׁמָשׁוֹת, נֶאֱסַר הַסַּל בְּטִלְטוּל לְכָל הַיּוֹם.
Just as it is forbidden to handle muktzeh, or something newly formed, so is it forbidden to place a vessel beneath those objects in order that they may drop therein; for by doing this, you are making the vessel useless,46This is somewhat similar to wrecking or demolishing, which is forbidden on Shabbos. [Mishnah Berurah 510: 20 citing Tur] because you will no longer be allowed to handle it. This is considered as if you cemented it there. (See above, Chapter 75, paragraph 11.) However, you may turn a basket over in front of young chicks so that they can go on and off it, because once they are no longer on it,47And even when they are on it you can chase them off. [Shulchan Aruch Harav 308: 78] it is permissible to handle the basket. If the chicks were on the basket at twilight,48And the basket is made for that purpose or the chicks were put there intentionally. [Magein Avraham 309: 6; Kilkeles Shabbos] it is forbidden to handle the basket for the rest of the day.
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.)