Who said "Attack where they are not prepared."?

This quote is attributed to Helmuth von Moltke.

Attack where they are not prepared. - Helmuth von Moltke

"Attack where they are not prepared."

Helmuth von Moltke

Military General Prussian 1800–1891

"No plan survives first contact with the enemy."

"Slow is smooth, and smooth is fast."

"The only thing certain in war is uncertainty."

"To be defeated and not submit, is victory."