And after him came out his brother. After Esau rules, Jacob will rule, and this is like what is stated, "For liberators shall march up on Mount Zion etc." (Obadiah 1:21) And his hand holding onto the heel of Esau. That Esau wanted to tear his mother's womb so that Jacob would not come out of there. And Jacob grabbed his ankle so that he could come out after him, but his mother's womb was destroyed and she could not bear children again.
And he called his name Jacob. The Holy One Blessed Be God called him Jacob on account of the heel. And Isaac was 60 years old when he sired them. He waited for Rebecca for 10 years, since she was not able to get pregnant, as she was 3 years old when they got married.
And he waited for her 10 years because a woman does not get pregnant younger than 13 years old. Those same ten years were not counted for her because she was not able to bear children, and after that when she was 13 years old, he waited for her 10 years, just as Abraham did for 23 years. At that time he prayed, and did not want to marry a handmaiden, because he wanted a perfect (wife). And in order to fulfill the words of his father and his mother, he did not want to take a wife for himself from the daughters of the Canaan, therefore he prayed on her behalf.