Midrash for Chullin 70:16
חולין שנעשו על טהרת קדש הרי הן כחולין
For it was taught: Common food kept in the cleanness proper to consecrated food is treated as common food.<span class="x" onmousemove="('comment',' And there does not exist with regard to it a third degree of uncleanness.');"><sup>7</sup></span>
Sifrei Devarim
"On the earth shall you spill it as water": Just as it is permitted to derive benefit from water, it is permitted to derive benefit from blood — Just as water renders seed susceptible (of incurring tumah), so, blood. Just as water need not be covered, so blood (that of a disqualified offering which has been slaughtered) need not be covered.
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