Foot
The foot, as in Deuteronomy 33:3, signifies an inferior principle. To set the right foot on the sea and the left on the earth, as in Revelation 10:2, signifies that the Lord has the universal church under His intuition and dominion.
(Riferimenti: Apocalypse Explained 10 [2]; Arcana Coelestia 2714)
Isaiah 37:6-7
6
Isaiah said to them, "Tell your master, 'Thus says Yahweh, "Don't be afraid of the words that you have heard, with which the servants of the king of Assyria have blasphemed me.
7
Behold, I will put a spirit in him and he will hear news, and will return to his own land. I will cause him to fall by the sword in his own land."'"