Which two boys in Genesis fought before they were born?

In the book of Genesis, the two boys who fought before they were born are Jacob and Esau. They were twins, and their struggle is described in Genesis 25:22-23, where Rebekah, their mother, feels them Wrestling in her womb. God reveals to her that two nations are in her womb, indicating the future conflict between their descendants. This foreshadows the rivalry that will continue throughout their lives.