Daily Zohar 3838
Holy Zohar text. Daily Zohar -3838

Hebrew translation:

128. וְנַעֲשָׂה דִין בַּכֹּל, בְּשָׁעָה שֶׁהִתְכַּנְּסוּ כֻלָּם בְּבָתֵּיהֶם וְלֹא הָיוּ מִתְפַּזְּרִים בַּמִּדְבָּר וּבַשָּׂדֶה, אֶלָּא כֻּלָּם נִמְצְאוּ בְּבָתֵּיהֶם, [וְאוֹר הַנֵּר יָפֶה לִבְדִיקָה מִבַּחוּץ] וְעָשָׂה הַלַּיְלָה אֶת דִּינָיו בַּכֹּל בְּאוֹתָהּ שָׁעָה. וְשָׁנִינוּ שֶׁהָיָה מֵאִיר הַלַּיְלָה כְּמוֹ הַיּוֹם בִּתְקוּפַת תַּמּוּז, וְרָאָה כָּל הָעָם אֶת דִּינֵי הַקָּדוֹשׁ בָּרוּךְ הוּא, זֶהוּ שֶׁכָּתוּב (תהלים קלט) וְלַיְלָה כַּיּוֹם יָאִיר כַּחֲשֵׁכָה כָּאוֹרָה.
129. וּבְשָׁעָה שֶׁיָּצְאוּ, נִמְצְאוּ כֻלָּם מֵתִים בַּשְּׁוָקִים לְעֵינֵי הַכֹּל. רָצוּ לִקְבֹּר אוֹתָם וְלֹא מָצְאוּ, וְזֶה הָיָה קָשֶׁה לָהֶם מֵהַכֹּל. רָאוּ אֶת יִשְׂרָאֵל יוֹצְאִים לְעֵינֵיהֶם בְּצַד אֶחָד, וְרָאוּ אֶת מֵתֵיהֶם בַּצַּד הָאַחֵר. וּבַכֹּל הָיָה פִּרְסוּם הַנֵּס שֶׁלֹּא הָיָה כָּזֶה מִיּוֹם שֶׁנִּבְרָא הָעוֹלָם.
130. וּבֹא רְאֵה, כָּתוּב לֵיל שִׁמֻּרִים הוּא לַה’ לְהוֹצִיאָם וְגוֹ’, הוּא הַלַּיְלָה הַזֶּה לַה’ שִׁמֻּרִים לְכָל בְּנֵי יִשְׂרָאֵל וְגוֹ’. פָּסוּק זֶה קָשֶׁה, כֵּיוָן שֶׁאָמַר לֵיל, מַה זֶּה שִׁמֻּרִים, וְלֹא שִׁמּוּר? שִׁמּוּר הָיָה צָרִיךְ (לִכְתֹּב)! וְכָתוּב הוּא הַלַּיְלָה הַזֶּה. לֵיל אָמַר בַּהַתְחָלָה, וְאַחַר כָּךְ לַיְלָה.


Zohar Bo
Continued from previous DZ
The judgment inflicted on the firstborn was done when all people were in their homes. Night, that is Malchut, executed the judgments at that time. That night was lit like a day in mid-summer, and the people saw the judgments that the Holy One Blessed be He, inflicted on Egypt.
Psalm 139:12
“גַּם חֹשֶׁךְ לֹא יַחְשִׁיךְ מִמֶּךָ וְלַיְלָה כַּיּוֹם יָאִיר כַּחֲשֵׁיכָה כָּאוֹרָה.”
“Indeed, the darkness shall not hide from You, But the night shines as the day; The darkness and the light are both alike to You.”

And when Israel left, everyone was found dead in the markets in front of everyone. When they looked to bury them, they did not find them, because the dogs ate them. Not all were eaten, as some of them remained, of which it is said;
Numbers 33:4
“וּמִצְרַיִם מְקַבְּרִים אֵת אֲשֶׁר הִכָּה יְהוָה בָּהֶם כָּל בְּכוֹר וּבֵאלֹהֵיהֶם עָשָׂה יְהוָה שְׁפָטִים.”
“For the Egyptians were burying all their firstborn, whom YHVH had killed among them. Also on their gods, YHVH had executed judgments.”

The killing of the firstborn was harder for the Egyptians than any of the previous plagues. While they were burying their dead, they saw Israel leaving for freedom. The Holy One Blessed be He did everything to proclaim the miracles, which had not been such since the day the world was created.

Exodus 12:42
“לֵיל שִׁמֻּרִים הוּא לַיהוָה לְהוֹצִיאָם מֵאֶרֶץ מִצְרָיִם הוּא הַלַּיְלָה הַזֶּה לַיהוָה שִׁמֻּרִים לְכָל בְּנֵי יִשְׂרָאֵל לְדֹרֹתָם.”
“It is a night to be observed for YHVH, for having brought them out of the land of Egypt; this night is for YHVH, to be observed by all the sons of Israel throughout their generations.”
The Zohar examines this verse and finds that the word ‘Night’ appears at the beginning of the verse as ‘ליל’ then ‘לילה’. The difference between the words may refer to the difference in the meaning of ‘observance’.

The meaning of the word ‘ליל’, that is ‘night’ without the letter ה at the end, usually refers to any previous night, and ‘לילה’ with the ה refers to the present night.
More explanation in the next paragraphs.

We can see the ‘firstborn’ as the initial thought that comes into our minds. If we recognize it as a seed of negativity from the other side, then we better kill it before it is developed and grow into an evil ‘leader’, meaning a thought that leads us to do negative actions that we may regret in the future.
If the ‘firstborn’ is good, we protect it and nourish it to grow strong.