Genesis 15:7-10

7The Lord also said to Abram, ‘I am the Lord. I brought you out of Ur of the Chaldeans to bring you to this land. I am giving it to you. It will belong to you.’

8But Abram said, ‘Almighty Lord, how can I be sure that this land will belong to me?’

9The Lord said to Abram, ‘Bring a young cow, a goat and a male sheep to offer them to me. Each animal must be three years old. Also bring a dove and a young pigeon.’

10Abram brought the three animals and the two birds to offer to God. Abram cut each animal in two pieces. He put the halves opposite each other. But he did not cut the birds in two pieces.