Angels come to Avraham and Sara. Avraham asks Sara to go get food for them.
The destruction of Sodom
Sara overhears a conversation between Avraham and the Angels and she is shocked!!!!!!!!!!
Yitzchak is born
Sara does not thank it can happen because she is turning 90.
Avraham's nephew escapes Sodom but his wife looks back and turns into a pillar of salt.
Even though Sara doubted it Yitzchak was born when Sara was 90!
As a test for Avraham he had to sacrifice his son and he listened and he was smiling the whole time but then he ended up not having to sacrifice his son after all. [Yitzchak was happy to be a Korban for Hashem.]