Who said "None return from my passage the same as they departed."?

This quote is attributed to The Bifrost.

None return from my passage the same as they departed. - The Bifrost

"None return from my passage the same as they departed."

The Bifrost

"I am the Bifrost, the rainbow bridge between worlds, forever connecting what was separated."

"All paths lead through me, whether mortals know it or not."

"To traverse me is to understand that all realms are one."

"I have witnessed the birth and death of civilizations across the Nine Realms."