From the unmanifest, all manifestations come forth at the coming of the day; At the coming of the night, they dissolve, into that very thing called the unmanifest.
At break of Brahma's day all things emerge from unmanifest nature; when night falls, all sink into unmanifest darkness.
(18) At the day's dawning all things manifest spring forth from the Unmanifest; and then at nightfall they dissolve [again] in that same thing called 'Unmanifest'.
8.18 With the coming of day all manifested things emerge from the Unmanifest and when night comes they merge in that itself which is called the Unmanifested.
8.18
8.18 From the Unmanifested all the manifested (worlds) proceed at the coming of the 'day'; at the coming of the 'night' they dissolve verily into that alone which is called the Unmanifested.