סימן עו סעיף ט
נוֹהֲגִין לוֹמַר פֶּרֶק בְּמַה מַּדְלִיקִין. וְאֵין אוֹמְרִים אוֹתוֹ בְּיוֹם טוֹב שֶׁחָל בְּשַׁבָּת, וְלֹא כְּשֶׁחָל יוֹם טוֹב בְּעֶרֶב שַׁבָּת, וְלֹא בְּשַׁבָּת חֹל הַמּוֹעֵד (ע"ר).
We are accustomed25Initiated by the Geonim [see Siddur Rav Amram Gaon]. to recite the chapter26Second chapter of Mishnayos Maseches Shabbos. entitled Bameh madlikin, [on Friday evening27From the order in which the author placed this rule, it would appear that he held that it should be said after Maariv, which was the custom of Ashkenaz, and it is also the opinion of Sefer Chassidim 154. Our custom, however, is to say it before Maariv according to the ruling of Avudraham. He says the reason for this custom is that candle lighting and other things that should be done before Shabbos are discussed in Bameh madlikin. Shelo and Ya’avetz agree. Sefer Haitim says the reason was to denounce the Karaites who prohibited having fire in one’s house on Shabbos. The Rashal (Responsum 64) and Shulchan Aruch Harav maintains that it should be said before Kiddush.]. It is not said when Yom Tov falls on Shabbos,28Lest it be said even when Yom Tov is on Erev Shabbos [Derashos Maharil—Laws of Sukkah]. nor when Yom Tov falls on Friday,29Because tithing and making an eiruv, as instructed in Bameh madlikin are prohibited when Yom Tov is on Erev Shabbos. [Avudraham] Rashal (Responsum 64) maintains that it should be said every Erev Shabbos. Both are consistent with their opinions as to the reason for saying it. See footnote 27. and not on Shabbos Chol Hamoed.
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.)