Just as [with] two, [if] one of them is found [to be] a kinsman or a disqualified [witness], their testimony is void, so too [with] three, [if] one of them is found [to be] a kinsman or a disqualified [witness], their testimony is void. How do we know that [this is so] even [for] a hundred? To teach [this] it states: witnesses. Said R' Yose: In regard to what is this said? In regard to capital cases; but in regard to civil cases, the testimony is estab-lished through the remaining [witnesses]. Rabbi says: Both in civil cases and in capital cases, but only if they warned them. But if they did not warn them —- what should two brothers do who saw someone commit a murder?

[If] two saw him from this window, and two saw him from that window, and one in the middle warned him —- if some of them saw each other, then they are one set of witnesses; if not, they are two sets of witnesses. Therefore, if one of them is found to be zomemim, both he and they are executed, and the second [set] is exempt. R' Yose says: They are not executed unless his two witnesses warn him, as it is said (Deut. 17:6): By the testimony of two witnesses. Another explanation: By the testimony of two witnesses —- that a sanhedrin should not hear [testimony] from the mouth of an interpreter.