Rashi on Exodus 22:27/רש"י על שמות כ״ב:כ״ז

1אלהים לא תקלל THOU SHALT NOT EXECRATE GOD — Here you have the prohibition of blasphemy (the penalty being stated in Leviticus 24:16) and the prohibition of cursing a judge (who is also termed אלהים, cf. Exodus 22:7) (cf. (Mekhilta and Sanhedrin 66a).