Reference for Moed Katan 17:20
ר' יונתן בן עסמיי ורבי יהודה בן גרים תנו פרשת נדרים בי ר' שמעון בן יוחי איפטור מיניה באורתא לצפרא הדור וקא מפטרי מיניה אמר להו ולאו איפטריתו מיני באורתא
Again, whence do we know that during the consecration of the Temple the restrictions of the Day of Atonement were suspended? - Shall I say because it is written, 'even fourteen days', maybe it means days appropriate?<span class="x" onmousemove="('comment',' For feasting, exclusive of the Day of Atonement.');"><sup>29</sup></span> - That is learnt from the analogy between the repeated word 'day' here and in the other place.<span class="x" onmousemove="('comment',' In connection with the offerings in the Tabernacle and here in the repetition 'seven days and seven days, even fourteen days'. This method of analogy is the Gezerah Shawah. See Glos.');"><sup>30</sup></span>