Genesis 15:9 WEB

⁷  He said to him, 'I am Yahweh who brought you out of Ur of the Chaldees, to give you this land to inherit it.'

⁸  He said, 'Lord Yahweh, how will I know that I will inherit it?'

⁹  He said to him, 'Take me a heifer three years old, a female goat three years old, a ram three years old, a turtle-dove, and a young pigeon.'

¹⁰  He took him all these, and divided them in the middle, and laid each half opposite the other; but he didn't divide the birds.

¹¹  The birds of prey came down on the carcasses, and Abram drove them away.