If they screwed up or tried to run off with the loot, their entire family would be slaughtered.
In the 19th century, a young boy named Charles watches as his family is slaughtered by a werewolf.
Her family had not been slaughtered, nor taken away as serfs for some trumped-up charge.
One day, her family is slaughtered, leaving no one alive.
My crew and I could hardly stand by as families were slaughtered.
Returning to his village, he finds that his family has been slaughtered.
Not even when my own family was slaughtered by Klingons.
If he didn't, his family would be slaughtered.
"And you found evidence that a family of stoats had been slaughtered."
Owen's family had been slaughtered, and someone was going to pay for it.