Who said "In the day we sweat it out on the street"?

This quote is attributed to Led Zeppelin.

In the day we sweat it out on the street - Led Zeppelin

"In the day we sweat it out on the street"

Led Zeppelin Work

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"

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."