What is the most heartbreaking comment you’ve ever received?

What is the most heartbreaking comment you’ve ever received? I am 22 now, but I will never forget the time when I was arguing with one of my classmates in whatsapp when I waa 13. She said to me "let's see if you can talk this much tomorrow in class, because usually your tongue can't do that". Idk what it is about this specific comment that still hurts me to this day when I remember it lol.