Reference for Shevuot 91:6
אמר רב נחמן בר יצחק הא מני ר' יהודה היא דאמר כל זמן ששבועה נוטה אצל בעה"ב שכיר נשבע ונוטל
Let the householder take an oath, and the artisan lose!<span class="x" onmousemove="('comment',' This question is directed against Samuel who holds that where the dispute is about the amount stipulated, the householder takes an oath, and is exempt.');"><sup>12</sup></span> - R'Nahman B'Isaac said: This is in accordance with the view of R'Judah<span class="x" onmousemove="('comment',' And Samuel does not agree with him, but with the other Sages.');"><sup>13</sup></span> who says whenever the oath inclines towards the householder, the hired person takes the oath and receives [his claim].<span class="x" onmousemove="('comment',' Whenever the householder should, according to Scripture, take the oath, i.e., when he admits part of the claim, as here, the oath is transferred from him to the employee, because the employer cannot remember so well (even in a dispute about the amount stipulated) , for he is busy with his labourers.');"><sup>14</sup></span>