Leviticus 24:16, 23

Anyone who speaks against the LORD must be put to death; all the people must kill him by throwing stones at him. Foreigners must be punished just like the people born in Israel; if they speak against the LORD, they must be put to death.

Then Moses spoke to the people of Israel, and they took the person who had cursed outside the camp and killed him by throwing stones at him. So the people of Israel did as the LORD had commanded Moses.