Study Sanhedrin folio 56A with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
On every day of a blasphemer’s trial, when the judges judge the witnesses, i.e., interrogate the witnesses, they ask the witnesses to use an appellation for the name of God, so that they do not utter a curse of God’s name. Specifically, the witnesses would say: Let Yosei smite Yosei, as the name Y
When the judgment is over, and the court votes to deem the defendant guilty, they do not sentence him to death based on the testimony of the witnesses in which they used an appellation for the name of God, without having ever heard the exact wording of the curse. Rather, they remove all the people
And the second witness says: I too heard as he did, but he does not repeat the curse explicitly. And the third witness, in the event that there is one, says: I too heard as he did. In this manner, the repetition of the invective sentence is limited to what is absolutely necessary.
Talmud: The Sage taught in a baraita: A blasphemer is not liable unless he blesses, a euphemism for curses, the name of God with the name of God, e.g., by saying: Let such and such a name strike such and such a name.
The Talmud asks: From where is this matter derived? Shmuel says: It is derived from that which the verse states: “And he who blasphemes [venokev] the name of YHWH shall be put to death; all the congregation shall stone him; the convert as well as the homeborn, when he blasphemes [benokvo] the name,