Leviticus 24:11; Leviticus 24:16

11 The son of the Israelite woman blasphemed the Name with a curse; so they brought him to Moses. (His mother’s name was Shelomith, the daughter of Dibri the Danite.)
16 anyone who blasphemes the name of the LORD is to be put to death. The entire assembly must stone them. Whether foreigner or native-born, when they blaspheme the Name they are to be put to death.