On one hand, the Torah says you shouldn't make a Neder. On the other hand, Yaakov made a נדר with Hashem before he went to Lavan's house?
In the first 3 minutes, we explain Rav Hersh approach to this.
Why is the reward for speaking Lashon Hora finding a treasure inside the walls of their house?
Parshas Toldos - Rabbi Hartman