Three Who Cannot Enter the Congregation of the Lord

The sages say: There are only three. (He omits the congregation of proselytes.)

(Devarim 23:3) "A mamzer may not come into the congregation of the L-rd." ("mamzer" =) "mum zar" ("a foreign blemish" [i.e., a blemish resulting from "foreign" (i.e., non-permitted) relationships]), whether a man or a woman.