Who said "Being is eternal and unchanging."?

This quote is attributed to Parmenides.

Being is eternal and unchanging. - Parmenides

"Being is eternal and unchanging."

Parmenides

Philosopher Ancient Greece 515–445

"What is, is. What is not, is not."

"Being is; not-being is not."

"One should both say and think that Being is."

"How could what is perish? How could it come to be?"