Genesis 3:14-15

14So the Lord God said to the snake, “Because you have done this, You are cursed more than all the wild or domestic animals. You will crawl on your belly. You will be the lowest of animals as long as you live.

15I will make you and the woman hostile toward each other. I will make your descendants and her descendant hostile toward each other. He will crush your head, and you will bruise his heel.”