Thanks, guys. In fact, I came across the phrase in a movie titled The Lord of the Rings. The original sentence is : Aragorn: You said you'd bind yourself to me forsaking the immortal life of your people. Arwen: And to that I hold.
The Lord of the Rings takes place in a different time period, so they use English that is a little bit different from normal English. In the movie it sounds natural, but saying it in real life would sound creepy.