אורח חיים רמ״טOrach Chayim 249

Se’if 1א׳

אֵין הוֹלְכִים בְּעֶרֶב שַׁבָּת יוֹתֵר מִג' פַּרְסָאוֹת, כְּדֵי שֶׁיַּגִּיעַ לְבֵיתוֹ בְּעוֹד הַיּוֹם גָּדוֹל וְיוּכַל לְהָכִין צָרְכֵי סְעֻדָּה לְשַׁבָּת, בֵּין שֶׁהוֹלֵךְ לְבֵית אֲחֵרִים בֵּין שֶׁהוֹלֵךְ לְבֵיתוֹ; וְהָנֵי מִילֵי כְּשֶׁהוּא בַּיִּשּׁוּב, בְּמָקוֹם שֶׁיּוּכַל לְהָכִין צָרְכֵי שַׁבָּת, אֲבָל אִם בְּמָקוֹם שֶׁהוּא שָׁם אִי אֶפְשָׁר לוֹ לְהָכִין צָרְכֵי שַׁבָּת, אוֹ שֶׁאֵינוֹ מְקוֹם יִשּׁוּב בָּטוּחַ, מֻתָּר לֵילֵךְ אֲפִלּוּ כַּמָּה פַּרְסָאוֹת; וְאִם שָׁלַח לְהוֹדִיעָם שֶׁהוּא הוֹלֵךְ שָׁם לְשַׁבָּת, מֻתָּר לוֹ לֵילֵךְ כַּמָּה פַּרְסָאוֹת בְּכָל גַּוְנָא.

Laws that Apply on Friday, 4 Seifim: On Friday, from the beginning of the day [onward], it is forbidden for a person [who is traveling] to walk more than three parsaos. [Note: A parsa is a Persian mile, equal to four mil, approximately four kilometers (about 2 ½ miles) in contemporary measure.] In this way, he will reach the destination where he plans to spend the Shabbos while it is still early in the day so that he will [have ample time to] prepare his Shabbos meal needs there, whether he goes to other people's houses or to his house. The above applies concerning a place where a person can prepare his Shabbos needs. If, however, he is located in a place where it is impossible for him to prepare his Shabbos needs, or he is not in a place that will certainly be his (Shabbos) place, it is preferable that he travel even many parsaos [farther]. If he sent to inform them they he is going there for Shabbat, it is permitted for him to several parsaos further in all cases.

Se’if 2ב׳

אָסוּר לִקְבֹּעַ בְּעֶרֶב שַׁבָּת סְעֻדָּה וּמִשְׁתֶּה שֶׁאֵינוֹ רָגִיל בִּימֵי הַחֹל, וַאֲפִלּוּ הִיא סְעֻדַּת אֵרוּסִין, מִפְּנֵי כְּבוֹד הַשַּׁבָּת, שֶׁיִּכָּנֵס לְשַׁבָּת כְּשֶׁהוּא תָּאֵב לֶאֱכֹל; וְכָל הַיּוֹם בִּכְלַל הָאִסוּר. הַגָּה: וּסְעֻדָּה שֶׁזְּמַנָּהּ עֶרֶב שַׁבָּת, כְּגוֹן בְּרִית מִילָה אוֹ פִּדְיוֹן הַבֵּן, מֻתָּר, כֵּן נ"ל וְכֵן הַמִּנְהָג פָּשׁוּט. וְלֶאֱכֹל וְלִשְׁתּוֹת בְּלִי קְבִיעוּת סְעֻדָּה, אֲפִלּוּ סְעֻדָּה שֶׁרָגִיל בָּהּ בַּחֹל, כָּל הַיּוֹם מֻתָּר לְהַתְחִיל מִן הַדִּין, אֲבָל מִצְוָה לְהִמָּנַע מִלִּקְבֹּעַ סְעֻדָּה שֶׁנָּהוּג בָּהּ בַּחֹל, מִט' שָׁעוֹת וּלְמַעְלָה.

On Friday, it is forbidden to partake of a celebratory feast that one would not ordinarily partake of on a weekday. [This is so] Even if it is an Erusin meal, because of the honor of Shabbat, so that one will enter Shabbos desiring to eat and partake of the Shabbos meal with an appetite. All day is forbidden. Rema: A Friday meal where one says zimun, such as a bris milah or pidyon ben it is permitted as seen above, and this is the simple custom. To eat and drink without partaking of the meal, even a meal that one ordinarily partakes of on the weekday, all day is permitted to begin according to the law. Nevertheless, it is a mitzvah to refrain from eating a meal from the ninth hour onward.

Se’if 3ג׳

דֶּרֶךְ אַנְשֵׁי מַעֲשֶׂה לְהִתְעַנּוֹת בְּכָל עֶרֶב שַׁבָּת.

It is the way of people to fast on every Erev Shabbat.