Yagnavalkya said: 'That of which they say that it is above the heavens, beneath the earth, embracing heaven and earth, past, present, and future, that is woven, like warp and woof, in the ether (akasa).'

In plain words: Yagnavalkya answers that all of that, across all space and all time, is woven into akasa, the space or ether that fills everything.