Who said "Patience is the virtue of the strong."?

This quote is attributed to Xenophon.

Patience is the virtue of the strong. - Xenophon

"Patience is the virtue of the strong."

Xenophon Patience

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."

"Patience is a virtue I'm still learning."

"I may be a redhead, but I'm not a hothead."

"Patience is a virtue."

"Patience is a virtue I never learned."