Reference for Yoma 165:16
טבל ותרומה תנאי היא דתניא מאכילין אותו טבל ואין מאכילין אותו תרומה בן תימא אומר תרומה ולא טבל אמר רבה היכא דאפשר בחולין דכולי עלמא לא פליגי דמתקנינן ליה ומספינן ליה
Rabbah said: If it is possible [to feed him] with common food,<span class="x" onmousemove="('comment',' [Probably it means that the hungry person can wait for the priestly dues to be duly set aside, v. D.S. a.l. p. 50].');"><sup>17</sup></span> there is general agreement that one should prepare it<span class="x" onmousemove="('comment',' By setting aside the prescribed dues.');"><sup>18</sup></span> for him and feed him with it; the dispute concerns the case when it is not possible [to feed him] with common food; one holds that [the prohibition of] tebel is more severe, the other assuming that the prohibition<span class="x" onmousemove="('comment',' In each case that food which is considered less forbidden, or involving less of a penalty, would be given first.');"><sup>19</sup></span>