דברים כט ,כ : וְהִבְדִילוֹ ה' לְרָעָה HaShem will set him aside from evil
Baal HaTurim notes that the Gematriya of the phrase "vehivdilo HaShem leraah" is equivalent to that of 'hinei zeh Yeravam' (this refers to Yerav'am).
There were two Jewish kings named Yeravam: 1) Yeravam the son of Nevat, the first king of the Ten Tribes of the North that broke away from the dynasty of Dovid in the south; 2) Yeravam, the son of Yoash, the fourteenth king of the north about a 150 years later. Both are described by the prophet as “evil” and causing the Jews to sin. Nevertheless, Yeravam ben Nevat by Chaza”l as the prime example of “evil” as the leader of the division of the Jewish nation into two and also setting up guards to prevent the Jews of the north from going to the Bais haMikdash (which was in the south).
Seventy Years of Exile
דברים כט ,כו: בְאַף וּבְחֵמָה וּבְקֶצֶף with anger, with wrath, and with great fury
Baal HaTurim remarks that the gematria of the above phrase is 422 which is equal to the word שבעים (70) indicating the 70 years of the Exile in Bavel.
Dot over the ע
דברים כט, כח: עַד־עוֹלָם
Baal HaTurim notes that the masorah has a text with a dot over the ע in the word עד. The letter ע equates to 70, which alludes to the seventy days from the first of Shvat when Moshe began to explain the Torah until the 10th of Nissan when the Jews crossed the Yarden and entered Eretz Yisrael. This indicates that punishment was no longer applicable to the Jews for the sins of an individual after 70 days.
The Pasuk has 10 dots earlier over the words לנו ולבנינו (us and our children). The 10 dots teach the HaShem did not punish the entire community (did no hold the community responsibility) for the hidden sins of an individual at a limit of seventy days.
Choose Life
דברים ל ,יט: וּבָחַרְ תָ בַחַיִים
Baal HaTurim remarks that the Gematriya of בחיים is seventy, as is that of the "sod" (secrets) in the Pasuk in Tehilim (25,14) "Sod Hashem li'yere'av". Moreover, he says, there are 'seventy explanations to the Torah'. Plus, the life span of a normal person is seventy years (Tehilim 90,10). The Torah is giving us a broad hint here on how to acquire life.
