Exodus 21:16

"He who kidnaps a man and sells him, or if he is found in his hand, shall surely be put to death.

Surrounding context

21:15 "And he who strikes his father or his mother shall surely be put to death.

21:16 "He who kidnaps a man and sells him, or if he is found in his hand, shall surely be put to death.

21:17 "And he who curses his father or his mother shall surely be put to death.