Reference for Chullin 187:13

אלא מכללא איתמר דשמואל הוה קא עבר במברא

Raba said: Because he [Samuel] told him to give him [the gentile] anpaka<span class="x" onmousemove="('comment',' , a form of the word (v. Jast. s.v.) , strictly, a small cup the capacity of one fourth of a log, cf. B.B. 58b. A popular term also for strong, unmixed wine.');">⁶</span>

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