Reference for Menachot 7:13

אלא כי גמרי גזירה שוה למותר נדבה הוא דגמרי

[I answer that] the Divine Law has expressly stated 'it' with regard to the sin-offering, as it is written, And he shall slaughter it for a sin-offering;<span class="x" onmousemove="('comment',' Ibid IV, 33.');">¹³</span> 'it' [namely, the sin-offering, i slaughtered] under its own name is valid but under any name other than its own is invalid, whereas all other offerings are valid whether offered under their own or under any other name.

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