Commentary for Kiddushin 116:14

<big><strong>גמ׳</strong></big> האומר לחבירו צא וקדש תנא מה שעשה עשוי אלא שנהג בו מנהג רמאות ותנא דידן הלך נמי דקתני הלך ברמאות

<big><b>MISHNAH: </b></big>IF HE SAYS TO HIS NEIGHBOUR, 'GO FORTH AND BETROTH ME SUCH A WOMAN,' AND HE GOES AND BETROTHS HER TO HIMSELF, SHE IS BETROTHED TO THE SECOND. LIKEWISE, IF HE SAYS TO A WOMAN, 'BE THOU BETROTHED UNTO ME AFTER THIRTY DAYS,' AND ANOTHER COMES AND BETROTHS HER WITHIN THE THIRTY DAYS, SHE IS BETROTHED TO THE SECOND: THUS AN ISRAELITE'S DAUGHTER [BETROTHED] TO A PRIEST MAY EAT TERUMAH.<span class="x" onmousemove="('comment',' Because she is certainly betrothed to him.');">¹⁶</span>

Daf Shevui to Kiddushin