Reference for Yevamot 62:11
אי הכי בגירושין נמי נימא הכי התם להצלה דידה קאתי הכא לחובה דידה קאתי:
they may sometimes consult the document and then come and tender evidence, while the All Merciful said, 'out of their mouth'<span class="x" onmousemove="('comment',' Cf. Deut. XVII, 6, At the mouth of two witnesses etc., which is taken to imply that evidence must be given from memory (the witnesses' own mouth) and not from information obtained from a written document. V. Git. 71a. ');"><sup>28</sup></span> but not out of their writing. If so, let the same argument<span class="x" onmousemove="('comment',' Used in respect of betrothal, that there is no safe or proper place to keep the deed. ');"><sup>29</sup></span> be applied to divorce also! — There,<span class="x" onmousemove="('comment',' In the case of divorce. ');"><sup>30</sup></span>