וַיִּֽחַר־אַ֥ף יְהוָ֖ה בָּאָ֣רֶץ הַהִ֑וא לְהָבִ֤יא עָלֶ֙יהָ֙ אֶת־כָּל־הַקְּלָלָ֔ה הַכְּתוּבָ֖ה בַּסֵּ֥פֶר הַזֶּֽה׃
therefore the anger of the LORD was kindled against this land, to bring upon it all the curse that is written in this book;
Read midrashic interpretation of Deuteronomy 29:26: and classical rabbinic exegesis.