א אַחַר תְּפִלַּת עַרְבִית צָרִיךְ לִקְבֹּעַ עֵת לַתּוֹרָה, לְקַיֵּם וְהָגִיתָ בּוֹ יוֹמָם וָלַיְלָה. וְיֵשׁ לָחוּשׁ בַּלַּיְלָה שֶׁאִם יֹאכַל תְּחִלָּה תַּחְטְפֶנוּ שֵׁנָה, מִתּוֹךְ שֶׁהוּא יָגֵעַ, וְהַטֶּבַע מְבַקֶּשֶׁת מְנוּחָה, וְנִמְצָא מִתְבַּטֵּל מִתּוֹרָה. עַל כֵּן יֵשׁ לִזָּהֵר שֶׁיִּקְבַּע לוֹ עֵת לִלְמֹד קוֹדֵם הָאֲכִילָה. אַךְ אִם הוּא רָעֵב וְלִבּוֹ חַלָּשׁ, שֶׁלֹּא אָכַל בַּיּוֹם לַשֹּׂבַֹע, יִטְעַם מְעַט כְּדֵי לְיָשֵּׁב דַּעְתּוֹ, וְאַחַר כָּךְ יִלְמַד קְצָת, וְאַחַר כָּךְ יֹאכַל סְעֻדָּתוֹ דֵּי צָרְכּוֹ, וְיַחְזֹר לִלְמוֹד תּוֹרָה אִישׁ אִישׁ כְּפִי הַשָּׂגָתוֹ. אָמְרוּ רַבּוֹתֵינוּ זִכְרוֹנָם לִבְרָכָה, לֹא אִבְּרָא לַיְלָה אֶלָּא לְגִרְסָא, וְהַיְנוּ בְּלֵילֵי חֹרֶף, וּמִכָּל מָקוֹם גַּם בַּלֵּילוֹת הַקְּצָרִים צָרִיךְ לִלְמוֹד מְעַט בְּכָל לַיְלָה, לְקַיֵּם וְהָגִיתָ בּוֹ יוֹמָם וְלַיְלָה. וּמִן חֲמִשָּׁה עָשָׂר בְּאָב וָאֵילַךְ יוֹסִיף מְעַט מְעַט. וְאָמַר רֵישׁ לָקִישׁ, כָּל הָעוֹסֵק בַּתּוֹרָה בַּלַּיְלָה, חוּט שֶׁל חֶסֶד נִמְשָׁךְ עָלָיו בַּיּוֹם, שֶׁנֶּאֱמַר, יוֹמָם יְצַוֶּה ה' חַסְדּוֹ וּבַלַּיְלָה שִׁירֹה עִמִּי. מַה טַּעַם יוֹמָם יְצַוֶּה ה' חַסְדּוֹ, מִשּׁוּם וּבַלַּיְלָה שִׁירֹה עִמִּי. וְאִכָּא דְּאַמְרֵי, אָמַר רֵישׁ לָקִישׁ, כָּל הָעוֹסֵק בַּתּוֹרָה בָּעוֹלָם הַזֶּה, שֶׁהוּא דּוֹמֶה לְלַיְלָה, הַקָּדוֹשׁ בָּרוּךְ הוּא מושֵׁךְ עָלָיו חוּט שֶׁל חֶסֶד בָּעוֹלָם הַבָּא שֶׁהוּא יוֹם, שֶׁנֶּאֱמַר, יוֹמָם יְצַוֶּה ה' חַסְדּוֹ וּבַלַּיְלָה שִׁירֹה עִמִּי. וּמִכָּל שֶׁכֵּן מִי שֶׁיֵּשׁ לוֹ חֹק קָבוּעַ לִלְמוֹד בְּכָל יוֹם וְנִתְבַּטֵּל בַּיּוֹם, שֶׁהוּא צָרִיךְ לְהַשְׁלִים חֻקּוֹ בַּלָּיְלָה.
1 After [completing] the Maariv prayer you should set aside a time for Torah [study], to fulfill the verse: "And you shall meditate in it day and night." ( Joshua 1:8) You should recognize the fact that if you eat first, you might be overcome by sleep since you are tired and nature will demand rest. This will cause you to neglect Torah study. Therefore, you should take care to set aside a time for study before your meal. However, if you are hungry and famished because you didn't eat enough by day, you may have a snack so that your mind is at ease, and then study a little. Then you may eat your meal to your satisfaction, and resume your Torah study, according to your ability. Our Sages of blessed memory said: "Night was created solely for study," referring to the [long] winter nights. Nevertheless, also during the shorter nights you should study a little each night to fulfill the verse: "And you shall meditate in it day and night." From the fifteenth day of the month of Av and on you should gradually add to your study period. Reish Lakish said: "Whoever is engrossed with Torah study at night a chord of grace is strung around him by day, as is said: 'By day God will command His grace [over us] and at night His song is with me.' [This can be interpreted:] "For what reason will God command His grace [over us], because His song is with me at night." Others stated: "Reish Lakish said: 'Whoever is engrossed in Torah study in this world which is compared to the night, God strings about him a chord of grace in the World to Come which is [compared to] day as is said: "By day God will command His grace and at night His song is with me".'" Certainly, one, who has a set time to study every day and was deterred during the day, should compensate for his commitment, at night.