Reference for Keritot 41:2

(ויקרא ז, כו) לעוף ולבהמה אי מה עוף שאין בה כלאים אף בהמה שאין בה כלאים

I must further exclude the blood found in eggs,for they are not of the category of flesh, and the blood of fish and of locusts, for they are always permitted.<span class="x" onmousemove="('comment',' I.e., they do not require slaughtering.');">²</span>

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