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.
(Odkazy: Arcana Coelestia 7729)
Arcana Coelestia # 1052
1052. Verse 16 And the bow will be in the cloud, and I see it, to remember the eternal covenant between God and every living soul in all flesh that is on the earth.
'And the bow will be in the cloud' means the state of that man. 'And I see it' means that he is such as can be regenerated. 'To remember the eternal covenant' means so that the Lord can be present with him within charity. 'Between God and every living soul in all flesh that is on the earth' means all people with whom this can take place. These verses have regard specifically to the person who is able to be regenerated.