In the portion of Toldot, it discusses the birth of Jacob and Esau and aspects of their lives. The Torah opens with the verse:[1]
And these are the generations of Isaac the son of Abraham; Abraham begot Isaac. And Isaac was forty years old when he took Rebecca the daughter of Bethuel the Aramean of Padan Aram, the sister of Laban the Aramean, to himself for a wife. And Isaac prayed to the Lord opposite his wife because she was barren, and the Lord accepted his prayer, and Rebecca his wife conceived. And the children struggled within her, and she said, "If [it be] so, why am I [like] this?" And she went to inquire of the Lord. And the Lord said to her, "Two nations are in your womb, and two kingdoms will separate from… Read More »

In the portion of Vayera, the inhabitants of the cities of Sodom and Gomorrah are accused of being morally depraved and threatened with destruction, upon which Abraham challenges G-d not to destroy the righteous with the wicked and, furthermore, to save the wicked on behalf of the righteous.
In the portion of Noah, it discusses the corruption of the generation of Noah and the contrast with Noah himself who was righteous. It states: