Hoof
'The hooves of the horses,' as mentioned in Ezekiel 26:21, signify scientific things which pervert truths. 'The hooves of horses' signify the lowest intellectual principles. 'A hoof' signifies truth in the ultimate degree, or sensory truth.
(References: Arcana Coelestia 7729)
Ezekiel 32:12-14
12
By the swords of the mighty will I cause your multitude to fall; the terrible of the nations are they all: and they shall bring to nothing the pride of Egypt, and all its multitude shall be destroyed.
13
I will destroy also all its animals from beside many waters; neither shall the foot of man trouble them any more, nor the hoofs of animals trouble them.
14
Then will I make their waters clear, and cause their rivers to run like oil, says the Lord Yahweh.