פְּרִ֤י אַדְמָֽתְךָ֙ וְכָל־יְגִ֣יעֲךָ֔ יֹאכַ֥ל עַ֖ם אֲשֶׁ֣ר לֹא־יָדָ֑עְתָּ וְהָיִ֗יתָ רַ֛ק עָשׁ֥וּק וְרָצ֖וּץ כָּל־הַיָּמִֽים׃
The fruit of thy land, and all thy labours, shall a nation which thou knowest not eat up; and thou shalt be only oppressed and crushed away:
Read midrashic interpretation of Deuteronomy 28:33: and classical rabbinic exegesis.