Leviticus 14:31

³¹ One for trespass, and the other for a holocaust, with their libations.

Turtles, and young pigeons

In Genesis 15:9 and Leviticus 12:6, this signifies the good of innocence; the young pigeon, interior good, and the turtle-dove exterior good. (Apocalypse Explained 314) They also represent exterior and interior spiritual things. (Arcana Coelestia 1727)