Midrash sa Levitico 3:3: Sifra

1) (Vayikra 3:3): "And he shall present from the sacrifice (of the shelamim") — even if it were not slaughtered in its name (e.g., even if he slaughtered an olah in the name of a shelamim or vice versa). "of the shelamim" — even if he did not perform semichah. "a fire-offering" — to that end (i.e., to exclude an intent of charring it instead of burning it to ashes.) "to the L–rd" — to the Creator of the world.

1) (Vayikra 3:9): "And he shall offer of the sacrifice (of the shelamim"): even if he did not slaughter it in its name (i.e., as a shelamim). "shelamim": even if he did not perform semichah upon it. "a fire-offering": to that end. "to the L–rd": in the name of the Creator of the world.

2) — whence it is derived: The slaughterer of the sacrifice must have six things in mind: (that the shechitah be) in the name of the (particular) sacrifice, in the name of the donor (of the sacrifice), in the name of the L–rd, in the name of a fire-offering (see above), in the name of (i.e., to the end of producing) a savor (on the altar, and not with the intent of roasting it beforehand), in the name of nichoach (i.e., to give "pleasure" to the L–rd by doing His will). (In the instance of) a sin-offering and a guilt-offering, (he must perform the shechitah) in the name of (i.e., towards the atonement of) the (particular) sin. R. Yossi says: Even if one (i.e., the shochet) had none of these (six things) in mind, it is kasher; for it is a provision of beth-din (that he not verbalize his intent [lest he err in the formulation]). And "intent" (here) is that of the performer (of the act of shechitah, and not that of the owner).