A robot may not injure a human being, or, through inaction, allow a human being to come to harm.
Notes from Wikiquote
The Second Law of Robotics
A robot may not injure humanity, or, through inaction, allow humanity to come to harm.
An atom blaster is a good weapon, but it can point both ways.
Quote text and notes from Wikiquote: Isaac Asimov (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.