The offender may already have been pronounced guilty by the rulers (see Exodus 18:21-22), and the case was referred to Moses in order that the punishment might be awarded by the divine decree. No law had as yet been enacted against blasphemy except by implication. See Exodus 21:17; Exodus 22:28.
Related Commentaries of Leviticus 24:12
Leviticus 24:12
12 And they put him in ward, that the mind of the LORD might be shewed them.