צָעַ֥ק לִבָּ֖ם אֶל־אֲדֹנָ֑י חוֹמַ֣ת בַּת־צִ֠יּוֹן הוֹרִ֨ידִי כַנַּ֤חַל דִּמְעָה֙ יוֹמָ֣ם וָלַ֔יְלָה אַֽל־תִּתְּנִ֤י פוּגַת֙ לָ֔ךְ אַל־תִּדֹּ֖ם בַּת־עֵינֵֽךְ׃ (ס)
Their heart cried unto the Lord: ‘O wall of the daughter of Zion, Let tears run down like a river Day and night; Give thyself no respite; Let not the apple of thine eye cease.
Read halakhic rulings (Jewish law) on Lamentations 2:18: and classical halakhic sources.