Reference for Menachot 165:8

במתניתא תנא משמיה דר' עקיבא (ויקרא ז, לז) זאת התורה כו' מנחה מה מנחה מקדשת בבלוע אף כל מקדשת בבלוע

so in the case of all other offerings the remainder is to be burnt but the living animal that might be left over<span class="x" onmousemove="('comment',' Where e.g., two animals were set apart for one offering as a measure of security, and one was left over, the latter was not burnt but was to be treated as the surplus of the offering; and so too with the young of an animal which had been consecrated pregnant.');">¹³</span> is not to be burnt.'

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