Do not keep silent! / Take no rest!
In a literary sense: Do not be still and do not rest. By extension: Do what needs to be done.
("O God, do not keep silent; do not hold Your peace or be still, O God... They say, 'Come, let us wipe them out as a nation; let the name of Israel be remembered no more.'" – Psalms 83:2; and: "Upon your walls, O Jerusalem, I have appointed watchmen... all day and all night, they shall never be silent. You who put the Lord in remembrance, take no rest" – Isaiah 62:6)
Translation
Expression (Hebrew)
אַל דֳּמִי לָךְ !
Definition (Hebrew)
בִּמְלִיצָה: אַל תִּשְׁקֹט וְאַל תָּנוּחַ. בְּהַשְׁאָלָה: עֲשֵׂה מָה שֶׁצָּרִיךְ לַעֲשׂוֹת.
("אֱלֹהִים אַל דֳּמִי לָךְ אַל תֶּחֱרַשׁ וְאַל תִּשְׁקֹט אֶל... אָמְרוּ לְכוּ וְנַכְחִידֵם מִגּוֹי וְלֹא יִזָּכֵר שֵׁם יִשְׂרָאֵל עוֹד"- תהלים פָּג ב, וְכֵן:"עַל חוֹמֹתַיִךְ יְרוּשָׁלִַם הִפְקַדְתִּי שֹׁמְרִים...לֹא יֶחֱשׁוּ הַמַּזְכִּרִים אֶת ה', אַל דֳּמִי לָכֶם"- יְשַׁעְיָהוּ סָב ו)