The First Covenant
Abram is upset by about not having any children and God said it will happen in time. God told Abram to bring animals, lay them out, and cut them in half. A torch and firepot appear and proceed to move between the animal pieces
God said that if he doesn't keep his word, then he would be cut like the animals. God came down to a human level (divine condescension). This represents a covenant God made, which makes them a family.