Reference for Bava Kamma 151:18

כי אתא רב דימי אמר ר' יוחנן בשוחט תמימים מבפנים לשם בעלים

that a slaughter through which the animal would not ritually become fit for food could not be called slaughter [in the eye of the law]. Is the slaughter [outside the Temple precincts] of sacrifices not similarly a slaughter which would not render the animal fit for food?<span class="x" onmousemove="('comment',' Cf. Lev. XVII. 3-9; Hul. 78a-80b. ');">¹⁵</span>

Jastrow