Deuteronómio 19:18 Referencias de la Mishná: Mishnah Makkot & Mishnah Sanhedrin

Witnesses are not condemned as perjurers until they themselves are incriminated; How so? If they said: “We testify that so and so killed a person” and others said to them: “How could you testify to that, as that murdered person or that [alleged] murderer was with us on that very day, at such and such a place?” [then] the witnesses are not condemned as perjurers. But, if these [other] witnesses said: “How could you testify to that, as on that very day, you were with us at such and such a place?’ [then] the former are condemned as perjurers, and are executed by their [the other witnesses] word.

Perjuring witnesses are not to be put to death until [after] the end of the trial. Because the Sadducees say: “[Perjurers were put to death] only after the accused had [actually] been executed, as it says, “ A life for a life” (Deuteronomy 19:21). The [Pharisaic] Sages said to them: “But has not it already been said “You shall do to him as he schemed to do to his fellow” (Deuteronomy 19:19) which implies when his brother is still alive? If so, why does it say “A life for life”? For it might have been that perjurers are liable to be put to death from the moment their testimony had been taken, therefore the Torah states “A life for a life” that is to say that they are not executed until [after] the termination of the trial.

“A person shall be put to death only on the testimony of two witnesses or three witnesses” (Deuteronomy 17:6).If the testimony is sufficiently established by two witnesses, why does Scripture [further] specify three? This is to compare two to three: just as three are competent to incriminate two as perjurers, so are two competent to incriminate three as perjurers. How do we know [that two or three can even incriminate] a hundred? The Torah states “witnesses”. Rabbi Shimon says: “Just as two witnesses are not put to death until both have been incriminated as perjurers, so three are not put to death until all three have been incriminated as perjurers. How do we know [that two or three can even incriminate] a hundred? The Torah states “witnesses”. Rabbi Akiba says: “The third witness was only mentioned in order to be stringent upon him and make his judgement the same as the other two. And if Scripture thus penalizes one who consorts with those who commit a transgression, as [if he is actually] one of those who commits the transgression, how much more so shall he who consorts with those who perform commandments receive a reward as [if he is actually] one of those who performs the commandments!”