Reference for Shevuot 91:4
מיתיבי הנותן טליתו לאומן אומן אומר קצצת לי שתים והלה אומר לא קצצתי לך אלא אחת כל זמן שטלית ביד אומן על בעה"ב להביא ראיה נתנה לו בזמנו נשבע ונוטל עבר זמנו המע"ה
- R'Nahman said: Both alternatives are meant: Either [the artisan] brings proof, and receives [his claim], or the householder takes an oath, and the artisan loses.<span class="x" onmousemove="('comment',' Do not deduce from the teaching of Rabbah b. Samuel that if the artisan does not bring proof, the employer is automatically exempt; if he does not bring proof, the employer must take an oath that he stipulated only one.');"><sup>8</sup></span> An objection was raised: If one gave his cloak to an artisan [to mend], and the artisan says.' You did stipulate to pay me two [zuz],' and the other says, 'I stipulated to pay you only one,' as long as the cloak is in the hands of the artisan, the householder must bring proof;<span class="x" onmousemove="('comment',' I.e., witnesses, that be stipulated to pay only one zuz, for he is the one who desires to exact from his neighbour (the cloak for only one zuz) .');"><sup>9</sup></span>