Who said "To command others, one must first command oneself."?

This quote is attributed to Xenophon.

To command others, one must first command oneself. - Xenophon

"To command others, one must first command oneself."

Xenophon Leadership

Historian Soldier Ancient Greece 430–354

"The sweetest of all sounds is praise."

"He who wishes to be obeyed must know how to command."

"It is impossible for a man to be cheated by anyone but himself."

"Know thyself."

"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"