בַּיּ֗וֹם שֶׁיָּזֻ֙עוּ֙ שֹׁמְרֵ֣י הַבַּ֔יִת וְהִֽתְעַוְּת֖וּ אַנְשֵׁ֣י הֶחָ֑יִל וּבָטְל֤וּ הַטֹּֽחֲנוֹת֙ כִּ֣י מִעֵ֔טוּ וְחָשְׁכ֥וּ הָרֹא֖וֹת בָּאֲרֻבּֽוֹת׃
In the day when the keepers of the house shall tremble, and the strong men shall bow themselves, and the grinders cease because they are few, and those that look out shall be darkened in the windows,
Read Jewish philosophical commentary on Ecclesiastes 12:3: and classical philosophical sources.