Punishment: Death Penalty for Blasphemy

The son of the Israelite woman blasphemed the Name with a curse. So they brought him to Moses. (His mother’s name was Shelomith daughter of Dibri, of the tribe of Dan.) …

Whoever blasphemes the name of the LORD must surely be put to death; the whole assembly must surely stone him, whether he is a foreign resident or native; if he blasphemes the Name, he must be put to death.

Then Moses spoke to the Israelites, and they took the blasphemer outside the camp and stoned him. So the Israelites did as the LORD had commanded Moses.