Who said "Black dogs and black crows are nothing to fear"?

This quote is attributed to Led Zeppelin.

Black dogs and black crows are nothing to fear - Led Zeppelin

"Black dogs and black crows are nothing to fear"

Led Zeppelin Courage

Rock Band British 1968–1980

"I've been dazed and confused for so long it's not true"

"The song remains the same"

"Whole lotta love is what I need"

"Black dog on my trail"

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."