Reference for Chullin 206:24

אף עם בין השינים

If the question was whether it [sc. what has been vomited forth] is considered as digested food or not, then he might have put the question with regard to a complete olive's bulk;<span class="x" onmousemove="('comment',' I.e., if a person ate an olive's bulk of a forbidden substance, vomited it forth, and swallowed it again, would he be liable twice or once only?');">¹¹</span>

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