Reference for Shevuot 33:4
בעי רב אשי נזיר בקבר בעי שהייה למלקות או אינו צריך בפנים גמירי שהייה בחוץ לא גמירי שהייה או דלמא באונס גמירי שהייה לא שנא בפנים ול"ש בחוץ תיקו:
For an accidental defilement there is a tradition that tarrying is necessary, but for wilful defilement there is no tradition that tarrying is necessary Or perhaps the tradition is that within [the Temple] tarrying is necessary, no matter whether for accidental or wilful defilement? It remains undecided. R'Ashi queried: Does a Nazirite at a grave require tarrying for stripes or not?<span class="x" onmousemove="('comment',' If a Nazirite (who must avoid defilement by the dead, Num. VI, 6) was borne aloft in the cemetery in a closed carriage (not, thereby, becoming unclean) , and when there the top of the carriage was removed, thus making him unclean from the air of the cemetery; and he was warned to leave, but he remained, though not the period of tarrying, is he liable for stripes? This example is similar to that of a person entering the Temple while clean, and becoming unclean inside.');"><sup>5</sup></span>