Genesis 3:14-15

14The Lord God said to the snake, ‘Because you have done this, I will curse you. Among all the farm animals and wild animals, you are the one that I will curse. From now on, you will move across the ground on your stomach. You will eat dust from the ground. You will do this for your whole life.

15I will cause you and the woman to become enemies. Your descendants and her descendants will always be enemies. One of her descendants will attack your head. You will attack his heel.’