Responsa for Shabbat 138:1
קמ"ל מיתיבי איזהו שגגת שבועת ביטוי לשעבר שאם אמר יודע אני ששבועה זו אסורה אבל איני יודע אם חייבין עליה קרבן או לא חייב הא מני מונבז היא
hence he [Abaye] informs us [otherwise]. An objection is raised: What is an unwitting offence in respect of an 'oath of utterance' relating to the past?<span class="x" onmousemove="('comment',' I.e., where one falsely swears that he has eaten. ');"><sup>1</sup></span>
Maharach Or Zarua Responsa
R. Hayyim Eliezer corresponded with his son and discussed whether a Jew is permitted to benefit from work that was performed by a Gentile on the Sabbath, or holidays, as well as work done by a Jew on these days under certain extenuating circurastances.
R. Hayyim Eliezer recalls that one time, the winterhouse was once heated by a Gentile on the Sabbath, and his father refused to eat therein. R. Samuel of Falaise in the name of R. Yom Tov permitted one to dwell in a winterhouse that was warmed by a Gentile on the Sabbath. In our city, most of the people rely upon this decision and dwell in winterhouses that are warmed by Gentiles on the Sabbath.
R. Hayyim Eliezer recalls that one time, the winterhouse was once heated by a Gentile on the Sabbath, and his father refused to eat therein. R. Samuel of Falaise in the name of R. Yom Tov permitted one to dwell in a winterhouse that was warmed by a Gentile on the Sabbath. In our city, most of the people rely upon this decision and dwell in winterhouses that are warmed by Gentiles on the Sabbath.
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