וְאַיֵּ֤ה אֱלֹהֶ֙יךָ֙ אֲשֶׁ֣ר עָשִׂ֣יתָ לָּ֔ךְ יָק֕וּמוּ אִם־יוֹשִׁיע֖וּךָ בְּעֵ֣ת רָעָתֶ֑ךָ כִּ֚י מִסְפַּ֣ר עָרֶ֔יךָ הָי֥וּ אֱלֹהֶ֖יךָ יְהוּדָֽה׃ (ס)
But where are thy gods that thou hast made thee? Let them arise, if they can save thee in the time of thy trouble; for according to the number of thy cities Are thy gods, O Judah.
Read Jewish philosophy on Jeremiah 2:28: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.