[If] one slaughters [an animal] for the designation of an olah-offering, a shelamim-offering, a guilt-offering in case of doubt, a pesach-offering, [or] a thanksgiving offering, his slaughtering is invalid, but R’ Shimon declares it valid. [If] two hold a knife and slaughter, one for one of these designations and one for a legitimate purpose, their slaughtering is invalid. [If] one slaughters [an animal] for the designation of a sin-offering, a definite guilt-offering, a firstborn, an animal tithe, [or] a substitution, his slaughtering is valid. This is the general rule: Whatever can be brought as a vow or as a donative offering — [if] one slaughters for its designation, it is prohibited; but whatever cannot be brought for a vow or for a donative offering — [if] one slaughters for its designation, it is valid.