Young donkeys
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])
Matthew 21:5
5
"Tell the daughter of Zion, behold, your King comes to you, humble, and riding on a donkey, on a colt, the foal of a donkey."