aha!
"Don't despair!" said Strider. "You must trust me now. Your Frodo is made of sterner stuff than I had guessed, though Gandalf hinted that it might prove so. He is not slain, and I think he will resist the evil power of the wound longer than his enemies expect.
I will do all I can to help and heal him. Guard him well, while I am away!"
Strider to Sam, after the attack of the Black Riders on Weathertop.