Reference for Menachot 43:9
א"ר יוחנן ושניהם מקרא אחד דרשו (ויקרא טז, יח) ולקח מדם הפר ומדם השעיר הדבר ידוע שדמו של פר מרובה מדמו של שעיר רבנן סברי
R'Johanan said, Both<span class="x" onmousemove="('comment',' I.e., the first Tanna (hereinafter referred to as 'the Rabbis') and R. Judah.');"><sup>20</sup></span> [derived their views by] expounding the same verse, viz. , And he shall take of the blood of the bullock and of the blood of the goat.<span class="x" onmousemove="('comment',' Lev. XVI, 18, in connection with the service on the Day of Atonement. The priest had to mix the blood of both animals and sprinkle it upon the altar; cf. Yoma 53b.');"><sup>21</sup></span> Now it is well known that the blood of a bullock is more than the blood of a goat;<span class="x" onmousemove="('comment',' Nevertheless the goat's blood, whose quantity is considerably less than that of the bullock, has not 'lost itself' i.e., it has not become neutralized in the mixture, since Scripture expressly names each blood separately.');"><sup>22</sup></span> the Rabbis therefore conclude