That’s a good one. It definitely seems that Regina likes to repeat herself/other people.
A couple more:
Pilot:
Regina to Snow and Charming: “I shall destroy your happiness if it is the last thing I do”
Regina to Emma: “Because if you don’t, I will destroy you if it is the last thing I do.”
The Thing You Love Most:
Regina: “Don’t underestimate me, Miss Swan. You have no idea what I’m capable of.”
Emma: “Because, sister, you have no idea what I’m capable of.”