In Isaiah 30:6, a young donkey signifies knowledges of particulars. (Arcana Coelestia 2781)

In Genesis 49:11, this signifies the natural truth of the external spiritual church, also rational truth of the internal spiritual church. (Arcana Coelestia 2781[5])

In Matthew 21:5, the Lord's riding on a colt or foal of a donkey signifies the natural and rational made subordinate. (Arcana Coelestia 2781[8])