Do you teach your children to hit back?

Stephanie C • Mommy x2 👦🏻👶🏻💙 Married to my best friend.
I am curious as to what moms tell their children when they are hit by other kids. Is it okay to teach them to hit back or would you prefer your child tell an adult and not hit back? I can see both sides. I want him to defend himself but 2 wrongs does not make a right. Thoughts?