Arcana Coelestia # 9679
9679. 'And you shall bring the ark of the Testimony in there, within the veil' means the coming-into-being of the inmost heaven within that uniting intermediary. This is clear from the meaning of 'the veil' as the intermediary uniting the two heavens, dealt with in 9670, 9671; and from the meaning of 'the ark of the Testimony' as the inmost heaven, dealt with in 9485; its coming-into-being is meant by 'bringing the ark in there'.
Exodus 8:21-23
21
Else, if you will not let my people go, behold, I will send swarms of flies on you, and on your servants, and on your people, and into your houses: and the houses of the Egyptians shall be full of swarms of flies, and also the ground whereon they are.
22
I will set apart in that day the land of Goshen, in which my people dwell, that no swarms of flies shall be there; to the end you may know that I am Yahweh in the midst of the earth.
23
I will put a division between my people and your people: by tomorrow shall this sign be."'"