This week's #Torah #Kasha #Parsha #LechLecha #Judaism

In #yeshiva, I learned that promises of good or rewards in #Tanakh are guaranteed, but promises of punishments are not neccesary, they 're like warnings. So for example when #Hashem promises success through the #Navi, it's guaranteed, but if He promises #exile, it's possible to avoid it.

If so, then why did so many #Rishonim try to calculate the #400years of slavery? Why didn't they just say "The warning no longer applied after ~200 years"