Who said "A leader doesn't ask others to do what he won't do himself."?

This quote is attributed to Captain Jack Hanna.

A leader doesn't ask others to do what he won't do himself. - Captain Jack Hanna

"A leader doesn't ask others to do what he won't do himself."

Captain Jack Hanna Leadership

"You're gonna need a bigger boat."

"Farewell and adieu to you fair Spanish ladies."

"I used to hate the water."

"Some men are coming to kill us and we're gonna kill them first."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"