Halakhah su Deuteronomio 25:1

To do to the collusive witness like he colluded: That we were commanded to do to the witnesses that testified false testimony according to what they sought to damage the one they testified against with their testimony - whether with money, with lashes or with death. And even though it is possible [for the witnesses to do this damage] without an act, they are lashed; due to the inclusion from the verse (Deuteronomy 25:1), "and they shall justify the righteous one, etc.," as it is found in the chapter [entitled] Arba Mitot (Sanhedrin 25a). And about this is it stated (Deuteronomy 19:19), "And they shall do to him like he colluded to do to his brother." And this is the law of the colluding witnesses mentioned in the Gemara in many places. And the content of collusion is that two witnesses come and contradict the first ones about their testimony - for example, that they say to them, "But how can you testify about thing x? And is it not that on that day that you are saying that story [happened], you were not in the place that you say it happened there, but rather you were with us in a different place?" This is the crux of refutation [of collusive] testimony. And the Torah commanded us to believe the latter witnesses over the first - whether the first were two, or even a hundred or more, as regarding testimony, two is like a hundred, and a hundred is like two.