Who said "The strongest fortress is a clear conscience."?

This quote is attributed to Herodotus.

The strongest fortress is a clear conscience. - Herodotus

"The strongest fortress is a clear conscience."

Herodotus

Historian Ancient Greece 484–425

"Egypt is the gift of the Nile"

"In peace, sons bury their fathers; in war, fathers bury their sons"

"Very few things happen at the right time, and the rest do not happen at all"

"The secret is to know what you want"