The sacrifice that was part of the aryan religion included placing into fire.

The Aryan religion (also known as Vedic religion) was the religion of the Indo-Aryans of northern India during the Vedic period. Their religious practice included liturgy and rituals for fertility, health and wealth. The rituals consisted of offering sacrifices to fire or water and chanting in Sanskrit. In most cases the sacrifices to fire were offerings like milk, ghee and vegetables, but sometimes they sacrificed cows or horses.