Who said "The wolf does not concern itself with the sheep."?

This quote is attributed to Arya Stark.

The wolf does not concern itself with the sheep. - Arya Stark

"The wolf does not concern itself with the sheep."

Arya Stark Strength

"A girl has no name."

"The north remembers."

"Not today."

"What do we say to the god of death? Not today."

"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."