"If I know him, he will have arranged matters so that when does set out to meet his death, it will truly mean the end of Voldemort."

Dumbledore opened his eyes. Snape looked horrified. "You have kept him alive so that he can die at the right moment?"

"Don’t be shocked, Severus. How many men and women have you watched die?"

"Lately, only those whom I could not save," said Snape. He stood up.

"You used me."

"I have spied for you and lied for you, put myself in mortal danger for you. Everything was supposed to be to keep Lily Potter’s son safe. Now you tell me you have been raising him like a pig for slaughter — "

DH (US edition p 687)