סימן עב סעיף ג
לְפִיכָךְ מְשַׁבֵּחַ הַנָּבִיא וְאוֹמֵר, אַשְׁרֵי אֱנוֹשׁ יַעֲשֶׂה זֹאת וּבֶן אָדָם יַחְזִיק בָּהּ שׁוֹמֵר שַׁבָּת מְחַלְּלוֹ וְגוֹ' וְכָל הַשּׁוֹמֵר אֶת הַשַׁבָּת כְּהִלְכָתוֹ וּמְכַבְּדוֹ וּמְעַנְּגוֹ כְּפִי כֹּחוֹ, גַּם כֵּן מְפֹרָשׁ עַל פִּי הַנָּבִיא שְׂכָרוֹ גַּם בָּעוֹלָם הַזֶּה, חוּץ מִן הַשָּכָר הָרַב הַצָּפוּן לָעוֹלָם הַבָּא, שֶׁנֶּאֱמַר, אִם תָּשִׁיב מִשַׁבָּת רַגְלֶךָ עֲשׂוֹת חֲפָצֶךָ בְּיוֹם קָדְשִׁי, וְקָרָאתָ לַשַׁבָּת עֹנֶג לִקְדושׁ ה' מְכֻבָּד, וְכִבַּדְתּוֹ מֵעֲשׂוֹת דְּרָכֶיךָ, מִמְּצוֹא חֶפְצְךָ וְדַבֵּר דָּבָר, אָז תִּתְעַנַּג עַל ה', וְהִרְכַּבְתִּיךָ עַל בָּמֳתֵי אָרֶץ, וְהֶאֱכַלְתִּיךָ נַחֲלַת יַעֲקֹב אָבִיךָ כִּי פִּי ה' דִּבֵּר (רמב"ם שָׁם).
Therefore the prophet offers praise and says, "Fortunate is the man who does this, and the son of man who maintains this, he who preserves the Shabbos from desecration etc."14Isaiah 56: 2. The prophet describes the reward of one who keeps the Shabbos in accordance with Halachah,15i.e., Torah laws. and honors it and delights in it to his utmost ability. He will be rewarded in this world besides the great reward reserved for him in the World to Come, as it is said:16Isaiah 58: 13. "If you restrain your feet [from going out of the techum]17Techum means boundary. You must not walk more than 2,000 amos past the city limits; see Chapter 95 for exact details. and abstain from doing your business on My holy day and you proclaim Shabbos a delightful day, and the sanctified of God, honored, and honor it by not engaging in your weekday activities, and abstain from pursuing your business affairs and (from) speaking words [pertaining to your weekday needs];18See Rashi, Maseches Shabbos, 113b. Rabbeinu Tam maintains that this is included in the prohibition of “pursuing your needs,” and explains that on Shabbos one should not engage in too much small talk [Yerushalmi]. The Rambam, Shabbos 24: 1–4 and Shulchan Aruch 307: 1 include both the above in “vedaber davar.” If you enjoy telling stories you may do so (Rema 307: 1). then you will delight yourself before Hashem, and I will cause you to ride over the heights of the earth, and will nourish you with the inheritance of Jacob, your father, for the mouth of God has spoken."19Isaiah 58: 14. 20Rambam (conclusion of laws of Shabbos).
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.)