Reference for Bava Metzia 224:9
והא אמרת בעל הבית טרוד בפועליו הוא הני מילי מקמיה דלימטייה זמן חיוביה
— It is too much trouble. Then let him pay him in advance!<span class="x" onmousemove="('comment',' Let this be a Rabbinical measure, with the result that if the worker subsequently claims that he has not been paid, he will be disbelieved. ');"><sup>9</sup></span> — Both prefer credit.<span class="x" onmousemove="('comment',' The employer, because he may not yet have the money; the employee, because he may lose it whilst working in the field. ');"><sup>10</sup></span> If so,<span class="x" onmousemove="('comment',' Reverting to the final reason. If we assume that the employer, being busily engaged, might have forgotten the exact facts. ');"><sup>11</sup></span> even if the dispute concerns a stipulated amount,<span class="x" onmousemove="('comment',' Lit., 'even if he stipulated.' ');"><sup>12</sup></span> it should be likewise so. Why then has it been taught: If the labourer maintains, 'You arranged with me for two [<i>zuz</i>].' and the other [sc. the employer] pleads, 'I arranged only for one,' the plaintiff must furnish proof?<span class="x" onmousemove="('comment',' Shebu. 46a. ');"><sup>13</sup></span> — The stipulated wage is certainly well remembered. [Again] if so, even if the set time passed, he should also be believed. Why did we learn: BUT IF HIS SET TIME PASSED, HE CANNOT SWEAR AND RECEIVE PAYMENT? — It is a presumption that the employer will not transgress [the law]. The wages of him that is hired etc. But have you not said that he is busy with his employees? — That is only before his obligation matures;