What did God promise in His covenant with Noah after the flood?

Answer: Never again to flood the earth

"Never again will all life be cut off by the waters of a flood; never again will there be a flood to destroy the earth."

“And I establish My covenant with you: Never again will all life be cut off by the waters of a flood; never again will there be a flood to destroy the earth.””— Genesis 9:11 (BSB)