1. Leviticus 20:14 (ESV)
  2. Exposition

What is the punishment for a man who is sexually intimate with a woman and her daughter?

Leviticus 20:14 (ESV)

14 If a man takes a woman and her mother also, it is depravity; he and they shall be burned with fire, that there may be no depravity among you.

The punishment in this instance is death by being burned with fire.