Reference for Bava Kamma 197:16

רבי מאיר סבר אין לשכירות אלא לבסוף ורבנן סברי יש לשכירות מתחילה ועד סוף

Now again, it was presumed [by the students] that according to all authorities there is continuous [growth of liability for] hire from the very commencement of the work until the end of it,<span class="x" onmousemove="('comment',' I.e., that strictly speaking each perutah of the hire becomes due as soon as work for a perutah is completed; a perutah is the minimum value of liability; v. Glos. ');">²⁹</span> and also that according to all authorities if one betroths [a woman] through [foregoing] a debt [owing to him from her], she would not be betrothed.<span class="x" onmousemove="('comment',' As this is not reckoned in law sufficient consideration; cf. Kid. 6b and 47a. ');">³⁰</span>

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