Related sur Yadayim 4:9

There is a stringency with Terumah and second tithe that there is not with first fruits: That Terumah and second tithe apply to [the lands of] Ammon and Moab, which is not the case with first fruits. There is a stringency with second tithe and first fruits that there is not with Terumah: That second tithe and first fruits require one to come to the "place" (i.e., the Temple, the "place" that God has chosen to have his name dwell (see Deut. 14:23 (second tithe), Deut. 26:2 (first fruits)), and they require a confession, and they are forbidden to a mourner -- but Rabbi Shimon permits them [to a mourner]. And they are liable in [the laws of] bi'ur (i.e., the requirement that one uproot produce growing during the sabbatical year, and declare it ownerless (see Sheviit 7:1, 9:4).]. Rabbi Shimon says, first fruits are exempt from bi'ur (Bikkurim 2:2). Rabbi Yosei says, since second tithe requires confession and first fruits require confession, [you must say that] since second tithe requires removal, so too first fruits must require removal as well. Rabbi Shimon said to him, since with second tithe, in which the requirement of bi'ur applies [both to seventh-year produce] as well as to money [exchanged for such produce], you must say that with respect to first fruits, as to which the money exchanged for them does not require bi'ur, [the first fruits themselves do not require removal during the sabbatical year].

A male Egyptian [convert] that marries a female Egyptian [convert], [or] a male Edomite [convert] that marries a female Edomite [convert]—the first and second generation is forbidden [from marrying into the congregation; see Devarim 23:9]; but the third is permitted. Said Rabbi Yehudah: Minyamin (sic! name in Ehrfurt manuscript) the Egyptian convert was havruta with one of the students of Rabbi Akiva. He said: "I am an Egyptian convert and I married an Egyptian convert. Behold I will go marry off my son to an Egyptian convert woman in order that my grandson should be fit to marry into the congregation, in order to fulfil what it says: "The third generation let them enter the congregation of God" (Devarim 23:9)." Rabbi Akiva said to him: "Minyamin you have erred in halakhah—Sanacherib, king of Assyria, came already and mixed up all of the nations; Ammonites and Moabites are not in their place, neither are Egyptians or Edomites in their place. Rather, a male Ammonite can marry a female Egyptian, a male Egyptian can marry a female Ammonite, and any one of these can marry anyone from any of the families of the earth, and any one of the families of the earth can marry any of these. It all depends on the child [whether he is able to marry into the community or not, since any of these people if they converted would be kosher Jews]."