Genesis 15:9-10

15:9 The Lord said to him, “Take for me a heifer, a goat, and a ram, each three years old, along with a dove and a young pigeon.” 15:10 So Abram took all these for him and then cut them in two and placed each half opposite the other, but he did not cut the birds in half.

Genesis 15:17

15:17 When the sun had gone down and it was dark, a smoking firepot with a flaming torch passed between the animal parts.