Who said "Patience is the greatest weapon of a statesman."?

This quote is attributed to Selim I.

Patience is the greatest weapon of a statesman. - Selim I

"Patience is the greatest weapon of a statesman."

Selim I Patience

Military Sultan Ottoman 1470–1520

"The conquest of Constantinople is the conquest of the world."

"A ruler must be swift in decision and firm in execution."

"The sword is the language of kings."

"To rule is to serve those beneath you."

"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."