Midrash su Levitico 17:4

1) I might think that I exclude (from kareth liability outside slaughtering of) a burnt-offering before its time by virtue of the state of its owners (e.g., zav) the guilt-offering of a Nazirite (in that state) and the guilt-offering of a leper that were slaughtered not for the sake of an offering (lo lishmah); it is, therefore, (to make them liable for such outside slaughtering) written "ox" — in any event; "lamb" — in any event; "goat" — in any event, (since the owners, even in their unfit state, are fit to slaughter them as donative offerings). "blood shall it be reckoned to that man": and not to his sender, (there being no "emissary" for transgression). "he has spilled blood": one who slaughtered is liable; two (holding the knife) who slaughtered are not liable.

2) For (without this verse) would it not follow (otherwise) a fortiori, viz.: If in a place (i.e., on the outside), where one who offers up (a consecrated animal) for a profane purpose is not liable (to kareth for offering up on the outside), two who offer up (for the L–rd) are liable — then in a place (i.e., on the outside), where one who slaughters (a consecrated animal) for a profane purpose, is liable (to kareth for slaughtering on the outside), how much more so should two who slaughtered (for the L–rd) be liable! It is, therefore, written "he has spilled blood" — One who slaughters is liable; two who slaughtered are not liable. "and that man will be cut off": the man, and not the congregation. "that man": and not one who is constrained, and not one who is unwitting, and not one who is mistaken. "from the midst of his people": And not his people (i.e., his people will not be cut off). His people remain at peace.

3) Until here (Vayikra 17:5) Scripture speaks of consecrations which were dedicated at the time that bamoth (temporary altars) were interdicted and he offered them outside (instead of within), their punishment being stated (to be kareth). Where is the exhortation against this? In (Devarim 12:13) "Take heed unto yourselves lest you offer up your burnt-offerings in every place that you see. (Devarim 12:14) "but in the place, etc."