Reference for Bekhorot 111:13

דומיא דבנך מה בנך שאין קבוע לו זמן אף שורך וצאנך שאין קבוע לו זמן

But why not say: Apply [the text] to the case of a pilgrim's burnt-offering of appearance [before the Lord]?<span class="x" onmousemove="('comment',' Which it is a duty to bring and which is not brought to atone for a sin.');">⁷</span>

Jastrow