Responsa for Sotah 6:23
תנו רבנן אי זו היא עדות הראשונה זו עדות סתירה עדות אחרונה זו עדות טומאה
— He also says similarly<span class="x" onmousemove="('comment',' The teacher in the Mishnah accepts the deduction from 'against her' and uses the argument from the occurrence of the word 'matter' for another purpose. He had been quoted wrongly and the Gemara proceeds with the correct form of the teaching. ');"><sup>21</sup></span> [and his teaching is to be cited as follows]: Therefore there is a text to state 'against her' [in the matter of misconduct] but not in the matter of warning, 'against her' [in the matter of misconduct] but not in the matter of seclusion; and whence is it that merely in a case of misconduct, where there had been no warning or seclusion one witness is not believed? It is stated here, 'Because he hath found some unseemly matter in her', and elsewhere it states: 'At the mouth of two witnesses, or at the mouth of three witnesses, shall a matter be established'; as in the 'matter' mentioned in the latter case two witnesses are required, so also here [where there has been misconduct without warning and seclusion] two witnesses are required. Our Rabbis have taught: Which is the 'first testimony'? Evidence of seclusion, and the 'final testimony' is evidence of 'defilement' [misconduct].