Who said "Flattery is the enemy of truth."?

This quote is attributed to Sancho Panza.

Flattery is the enemy of truth. - Sancho Panza

"Flattery is the enemy of truth."

Sancho Panza

Character in Don Quixote

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"Every dog has his day."

"All that glisters is not gold."

"Proverbs are short sentences drawn from long experience."

"Hunger is the best sauce."