סימן רה סעיף ג

אִשָּׁה נְשׂוּאָה שֶׁאֵרְעָהּ אֵבֶל, אָסוּר לָהּ לֶאֱכוֹל סְעוּדָה הָרִאשׁוֹנָה מִשֶּׁל בַּעְלָהּ, דְּכֵיוָן שֶׁהוּא מְחֻיָב לְזוּנָהּ, שֶׁלָּהּ הִיא. וְכֵן מִי שֶׁיֶשׁ לוֹ שָׂכִיר, אִם אוֹכֵל בִּשְׂכָרוֹ וְאֵרְעוֹ אֵבֶל, לֹא יֹאכַל סְעוּדָה הָרִאשׁוֹנָה מִשֶּׁל בַּעַל הַבִַּיִת שֶׁלּוֹ. אֲבָל מִי שֶׁהוּא זָן יָתוֹם אוֹ בְנוֹ אוֹ בִתּוֹ בְּלֹא תְנַאי וְאֵרְעָם אֵבֶל, יְכָוֹלִים לֶאֱכוֹל מִשֶּׁלּוֹ, שֶאֵין זֹאת שֶּׁלָּהֶם.

If a married woman became a mourner, she is forbidden to eat her first meal from her husband's food, for since it is his duty to support her, it is considered as her own food. Similarly, if a hired person works for someone and his meals are part of his wages, and he became a mourner, he should not eat his first meal from his employers's food. However, if a person supports an orphan, or his own grownup son or daughter without any legal commitment to do so, and they became mourners, they may eat their first meal from his food for it is not considered as their own.

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.)