Mishneh Torah, Fasts 5:6-8
משנה תורה, הלכות תעניות ה׳:ו׳-ח׳
Mishneh Torah, Fasts 5:6-8
Rambam lays out the practices of communal mourning before Tisha B'Av, including increased restrictions as the fast approaches. While he does not frame the issue in terms of whiskey specifically, his codification grounds the broader laws of aveilut in the period.
מִשֶּׁיִּכָּנֵס אָב מְמַעֲטִין בְּשִׂמְחָה. וְשַׁבָּת שֶׁחָל תִּשְׁעָה בְּאָב לִהְיוֹת בְּתוֹכָהּ אָסוּר לְסַפֵּר וּלְכַבֵּס וְלִלְבּשׁ כְּלִי מְגֹהָץ אֲפִלּוּ כְּלִי פִּשְׁתָּן עַד שֶׁיַּעֲבֹר הַתַּעֲנִית. וַאֲפִלּוּ לְכַבֵּס וּלְהַנִּיחַ לְאַחַר הַתַּעֲנִית אָסוּר. וּכְבָר נָהֲגוּ יִשְׂרָאֵל שֶׁלֹּא לֶאֱכל בָּשָׂר בְּשַׁבָּת זוֹ וְלֹא יִכָּנְסוּ לַמֶּרְחָץ עַד שֶׁיַּעֲבֹר הַתַּעֲנִית. וְיֵשׁ מְקוֹמוֹת שֶׁנָּהֲגוּ לְבַטֵּל הַשְּׁחִיטָה מֵרֹאשׁ הַחֹדֶשׁ עַד הַתַּעֲנִית: תִּשְׁעָה בְּאָב לֵילוֹ כְּיוֹמוֹ לְכָל דָּבָר. וְאֵין אוֹכְלִין אֶלָּא מִבְּעוֹד יוֹם. וּבֵין הַשְּׁמָשׁוֹת שֶׁלּוֹ אָסוּר כְּיוֹם הַכִּפּוּרִים. וְלֹא יֹאכַל בָּשָׂר וְלֹא יִשְׁתֶּה יַיִן בַּסְּעֻדָּה הַמַּפְסִיק בָּהּ. אֲבָל שׁוֹתֶה הוּא יַיִן מִגִּתּוֹ שֶׁיֵּשׁ לוֹ שְׁלֹשָׁה יָמִים אוֹ פָּחוֹת. וְאוֹכֵל בָּשָׂר מָלִיחַ שֶׁיֵּשׁ לוֹ שְׁלֹשָׁה יָמִים אוֹ יֶתֶר. וְלֹא יֹאכַל שְׁנֵי תַּבְשִׁילִין:
When the month of Av enters, we reduce our joy. During the week of Tish'ah B'Av, it is forbidden to cut one's hair, to do laundry, or to wear a pressed garment - even one of linen - until after the fast. It has already been accepted as a Jewish custom not to eat meat or enter a bathhouse during this week until after the fast. There are places that follow the custom of refraining from slaughtering from Rosh Chodesh Av until after the fast. All [the restrictions of] Tish'ah B'Av apply at night as well as during the day. One may not eat after sunset [of the previous day]; [it is forbidden to eat] between sunset and the appearance of the stars, as on Yom Kippur. One should not eat meat or drink wine at the meal before the fast. One may, however, drink grape juice that has not been left [to ferment] for three days. One may eat salted meat that was slaughtered more than three days previously. One should not eat two cooked dishes.