One Hundred

שמות ו,ו: לָכֵן אֱמֹר לִבְנֵי־יִשְ רָאֵל
The Baal HaTurim notes that the Gematria of the word לכן equals 100 of the Avos (each who had a concept of 100) which was the source of the merit that the nation was redeemed from Mitzrayim.

Avrohom has his son Yitzchak when he was 100 years old. Yitzchak had field that yielded one times its expected crops. And Yaacov fathered all his children by the age of 100.

Yaacov was 63 years old when he left Beer-sheva. He learned for 14 years in the Yeshivah of Ever. He then worked for Lavan for 20 years and was two years on the road. There his last child, Binyamin was born.