Leviticus 24:14-16

14“Bring the one who cursed, out of the camp, and let all who heard him lay their hands on his head, and have the entire congregation stone him.

15“Then you will speak to Bnei-Yisrael, saying: Whoever curses his God will bear his sin.

16Whoever blasphemes the Name of Adonai must surely be put to death. The whole congregation must stone him. The outsider as well as the native-born, when he blasphemes the Name, is to be put to death.