Every man to his colours / each under his own flag
Each person according to the social group to which he belongs (the origin of the expression is apparently in the flag that was raised at the head of each camp).
("And the children of Israel shall camp, every man by his own camp, and every man by his own standard, throughout their hosts" - Numbers 1:52 (description of the Israelites in the wilderness), and: "And the bands of rejoicing shall camp in his heart, each man under his flag / and all the people returned, each to his own tent" - Immanuel the Roman (13th century) / The Inheritance)
Translation
Expression (Hebrew)
אִישׁ עַל מַחֲנֵהוּ וְאִישׁ עַל דִּגְלוֹ, אִישׁ עַל דִּגְלוֹ
Definition (Hebrew)
כָּל אֶחָד ע"פ הַמַּחֲנֶה הַחֶבְרָתִי שֶׁאֵלָיו הוּא מִשְׁתַּיֵּךְ (מְקוֹר הַבִּטּוּי כְּכָל הַנִּרְאֶה בַּדֶּגֶל שֶׁהִתְנוֹסֵס בְּרֹאשׁ כָּל מַחֲנֶה).
("וְחָנוּ בְּנֵי יִשְׂרָאֵל אִישׁ עַל מַחֲנֵהוּ וְאִישׁ עַל דִּגְלוֹ לְצִבְאֹתָם"- בְּמִדְבַּר א נֹב ( תֵּאוּר בְּנֵי יִשְׂרָאֵל בְּמִדְבַּר), וְכֵן:"וּגְדוּדֵי הַשְּׂמָחוֹת יַחֲנוּ בְּלִבּוֹ אִישׁ אִישׁ עַל דִּגְלוֹ/ וְכָל הָעָם שָׁב אִישׁ לְאָהֳלוֹ" - עִמָּנוּאֵל הָרוֹמִי(הַמֵּאָה הי"ג)/ הַיְּרֻשָּׁה)