Responsa do Wyjścia 20:7
לֹ֥א תִשָּׂ֛א אֶת־שֵֽׁם־יְהוָ֥ה אֱלֹהֶ֖יךָ לַשָּׁ֑וְא כִּ֣י לֹ֤א יְנַקֶּה֙ יְהוָ֔ה אֵ֛ת אֲשֶׁר־יִשָּׂ֥א אֶת־שְׁמ֖וֹ לַשָּֽׁוְא׃ (פ)
Nie wzywaj imienia Wiekuistego, Boga twojego, do fałszu! Gdyż nie przepuści Wiekuisty temu, który wzywa imię Jego do fałszu.
Teshuvot HaRosh
As to his desire to marry a second wife in order to procreate: He should not violate an oath, which is so severe that the entire world shook at the statement “[the Lord will not] leave him unpunished” (Shemot 20:7; Shevu’ot 39a), for the sake of the mitzva of procreation. Had she given him money like he wanted, he would not have been concerned about the mitzva of procreation. Therefore, I do not think his oath should be released at all.
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