Who said "I am the guardian of passages, the keeper of cosmic roads."?

This quote is attributed to The Bifrost.

I am the guardian of passages, the keeper of cosmic roads. - The Bifrost

"I am the guardian of passages, the keeper of cosmic roads."

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."