Eating for the Sake of Heaven

˃ְנָגְדּ רַשְׂעַמ םָשׁ וֹמְשׁ ןֵכַּשְׁל רַחְבִי רֶשֲׁא םוֹקָמַּבּ ˃יֶק˄ֱא 'ה יֵנְפִל ָתְּלַכָאְו ˃ְרָקְבּ תֹרֹכְבוּ ˃ֶרָהְצִיְו ˃ְשׁריִתּ ˃יֶק˄ֱא 'ה תֶא הָאְרִיְל דַמְלִתּ ןַעַמְל ˃ֶנאֹצְו ג"כפ ד"י קרפ םירבד רפס :םיִמָיַּה לָכּ

In the name of the Chidushei HaRim ZY"A, The Gemoroh in Yevomos (Daf 93.1), teaches, these are Shabbosos and Yomim Tovim, meaning, just like Ma'asar Sheini which was eaten in Yerusholayim, to show that its eating is also Avodas Hashem, so too, one must understand Oneg Shabbos and Yom Tov, to eat Lisheim Shomayim, and it will be considered to the Avodas Hashem. As Chazal say Bechol derochechoh Do'ehu - In all your ways you shall know Him.

Sefer Siach Sarfei Kodesh