Ibn Ezra on Deuteronomy 30:18/אבן עזרא על דברים ל׳:י״ח

1THAT YE SHALL SURELY PERISH. This explains death and evil (v. 15), for they and their children and their wealth shall perish.

2YE SHALL NOT PROLONG YOUR DAYS. The reverse of the Lord thy God shall bless thee in the land (v. 16).