Talmud (Rodkinson Edition) — Book 3…
“ How is the case to be considered concerning the man who brought a paschal sacrifice not for its proper purpose? Shall we assume that he made a mistake (and thought that he was slaughtering another sacrifice) , and still he is held culpable? Whence the inference that the denomination of a thing may also be annulled through error; but this is not so. Therefore it must be assumed that there was no error, but that the man intentionally sacrificed the paschal offering for another purpose (f.i., for a peace-offering) ”
