Who said "We are without mercy. We are without pity."?

This quote is attributed to Dalek.

We are without mercy. We are without pity. - Dalek

"We are without mercy. We are without pity."

Dalek Strength

"Exterminate! Exterminate!"

"You will be exterminated!"

"Daleks do not feel pity or remorse or fear."

"We are superior. We are pure."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."