Who said "The task is noble; do not ask about the reward."?

This quote is attributed to Anton Chekhov.

The task is noble; do not ask about the reward. - Anton Chekhov

"The task is noble; do not ask about the reward."

Anton Chekhov Work

Playwright Novelist Russian 1860–1904

"Man will become better when you show him what he is like."

"Any idiot can face a crisis, it is the day to day living that wears you out."

"If you fear something, you give it power over you."

"Don't tell me the moon is shining; show me the glint of light on broken glass."

"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."