Who said "Betrayers and traitors would be punished with death"?

This quote is attributed to Napoleon.

Betrayers and traitors would be punished with death - Napoleon

"Betrayers and traitors would be punished with death"

Napoleon Justice

Character in Animal Farm

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"The traitor Snowball"

"Do not imagine that leadership is a pleasure"

"Snowball had plotted with Jones all along"

"We must be vigilant against our enemies"

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."