תּוֹרָה קכה

The eating of Shabbos is very precious and holy — and it is a commandment to increase in Shabbos foods. For it is entirely divinity and entirely holy. Therefore one must be careful that it have no portion or hold from the weekdays. That is — one should not eat simply because he is hungry from yesterday — or in order not to be hungry tomorrow. For through this the weekdays have a hold and portion in one's eating. Therefore one must intend in one's eating on Shabbos — only for the sake of the holiness of Shabbos itself. And this is the aspect of the threefold occurrence of ""today"" [ha-yom] written in connection with the eating of Shabbos — to allude that one's eating be only for the sake of the holiness and honour of the day itself.