Reference for Keritot 47:7
אמר רב יהודה אמר רב
Said Rab Judah in the name of Rab: The Rabbis concede to R'Meir in the case of a suspensive guilt-offering [which was brought on the strength of] the evidence of witnesses who were subsequently proved to be 'plotters',<span class="x" onmousemove="('comment',' Zomemim, v. Glos. I.e., two witnesses gave evidence that he did something which was a doubtful sin, whereupon he is obliged to offer a suspensive guilt-offering. As it was not his conscience which prompted him to seek expiation, it is thought that he offered the sacrifice with reservation. The witnesses were then, before the slaughtering of the animal, proved to be 'plotters' by reason of their absence from the scene of the alleged offence; v. Deut. XIX, 18f and Mak. I, 1ff. The law distinguishes between witnesses who are contradicted and witnesses who have been proved to be 'plotters'. In the former instance the subject matter of the evidence is contradicted by two other witnesses. Neither testimony is then accepted. In the latter instance evidence is brought against the credibility of the first witnesses by proving that at the time when the alleged act was supposed to have taken place the witnesses were seen in a different place. V. Mak. 2ff.');"><sup>3</sup></span>