Reference for Yevamot 72:13

ואיתמר מת בתוך ל' יום ועמדה ונתקדשה

Said Mar Zutra: This may also be deduced, since the expression used was 'he shall put her out'<span class="x" onmousemove="('comment',' [H] Hif. of [H] 'to go out'. ');">³⁵</span> and not 'he shall let her part'.<span class="x" onmousemove="('comment',' [H] Hif. of [H] 'to separate'. ');">³⁶</span> This proves it.

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