Genesis 15:9

And he said unto him, Take me an heifer of three years old, and a she goat of three years old, and a ram of three years old, and a turtledove, and a young pigeon.

Cross-reference

Psalm 50:5 describes God gathering those who made a covenant by sacrifice — exactly what happens here as Abram prepares animals at God's command.

Leviticus 14:22 allows doves or pigeons for the poor person's cleansing offering — the same bird types God specifies for Abram's covenant ceremony.