Those things, i.e. the remainders of the oblations mentioned Exodus 29:32. A stranger, i.e. one who is not of the priestly race, whereas in other peace-offerings the offerer did eat a part.
Related Commentaries of Exodus 29:33
Exodus 29:33
33 And they shall eat those things wherewith the atonement was made, to consecrate and to sanctify them: but a stranger shall not eat thereof, because they are holy.