Who said "I serve because service is its own reward."?

This quote is attributed to W'Kabi.

I serve because service is its own reward. - W'Kabi

"I serve because service is its own reward."

W'Kabi Work

"The throne is not promised to anyone. We must earn our place."

"Loyalty to our nation comes before all personal desires."

"A warrior's strength is measured not by his weapon, but by his conviction."

"We protect what is ours. That is the way of Wakanda."

"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."