Related su Qiddushin 4:15

The daughter of a priest, levi or Israelite that got married to a convert—the child lis a convert; to a freedman—the child is a freedman. A Gentile or slave that had sex with a daughter of Israel and she bore a son—the child is a bastard (mamzer). Rabbi Shimon ben Elazar (sic! based on Ehrfurt manuscript): There is no bastard except for from a woman that is forbidden by a forbidden sexual relationship and for which they make him suffer karet.

Converts, freedmen, mamzerim (bastards), netinim (descendants of temple slaves), shetukim (orphan with no father), asufim (orphan with neither known parent; see Mishnah Kiddushin 4:1), and any [class of people] that are forbidden from marrying into the congregation are permitted to marry each other—words of Rabbi Meir. Rabbi Yehudah says: There are 4 congregations [that are all permitted to marry each other]—kohanim, levi'im, yisrael, converts, and anyone else [not in any of those 4 congregations] is allowed to marry each other. But Hakhamim say: There are 3 congregations—kohanim, levi'im, yisrael. Rabbi Eliezer says: Anyone who is forbidden to marry into the congregation—two people who each have certain status are permitted [to marry each other]; one person with certain status with one person with doubtful status, doubtful with certain and doubtful with doubtful are forbidden [to marry each other].

A female Levite or female Yisrael—[one who seeks to marry them should] add upon them an additional one [generation on both sides that he should investigate to understand their lineage, 1 more than for a female Kohen], which is 12 [people to investigate]. (The following translated from the Ehrfurt manuscript:) If he investigated the mother, he does not need to investigate the children. If he investigated the adults, he does not need to investigate the minors. When does this apply? When [investigating a family that has] one wife. But when [the family has] 2 wives—if he investigated the mother, he needs to investigate the children; and if he investigated the adults, he needs to investigate the minors [because they might be born from different women].

(Translated from Ehrfurt manuscript:) A man who said: "My son is a mamzer", "My son is the son of a divorcee" or "the son of a halutzah (a woman whose levirate bond was broken with halitzah)", if [he said this] about a minor—he is believed; but about a major—he is not believed—words of Rabbi Yose. But Hakhamim say: Even if both of them (the man and woman) say that the foetus in her womb is a mamzer—they is not believed.

A man who went with his wife to the land beyond the sea, and he, his wife and his children came back, and he said: "The wife that went with me to the land beyond the sea—this is her and these are her children"—he needs to bring evidence neither about her nor about the children [to prove that they are his and hers]. "[The wife that went with me...] died, but here are her children"—he needs to bring evidence about the children but doesn't need to bring evidence about the wife. A woman/wife is believed when she says, "These are my children". (The following translated from the Ehrfurt manuscript:) A man is believed when he says: "The wife that I married in the land beyond the sea—this is her and these are her children"—he needs to bring evidence neither about the wife, nor about the children. "[I married a wife there but] she died, and these are her children"—he needs to bring evidence on both the wife and the children. A woman is believed when he says "These are my children."

(Translated from Ehrfurt manuscript:) One wife can be secluded with 2 men, even if both of them are kuti'im, even if both of them are slaves, even if one of them is a kuti and one of them is a slave, even if one of them is a minor, except for a minor with regard to whom he [the adult man] has no shame to have sex in his [the minor's] presence. But she should not be secluded with any Gentiles, even 100 [of them]. His sister, his mother-in-law and any other person with whom sex would be forbidden—he should not be secluded with them except on the basis of two [witnesses]. Rabbi Elazar says: A man who has a wife and children but doesn't live with them shouldn't teach children [Scripture]. Rabbi Yehudah says: A single man shouldn't shepherd small cattle, and two single men shouldn't sleep in one cloak. They said: Yisrael is not suspected of such [bestiality].

(Translated from Ehrfurt manuscript:) One wife can be secluded with 2 men, even if both of them are kuti'im, even if both of them are slaves, even if one of them is a kuti and one of them is a slave, even if one of them is a minor, except for a minor with regard to whom he [the adult man] has no shame to have sex in his [the minor's] presence. But she should not be secluded with any Gentiles, even 100 [of them]. His sister, his mother-in-law and any other person with whom sex would be forbidden—he should not be secluded with them except on the basis of two [witnesses]. Rabbi Elazar says: A man who has a wife and children but doesn't live with them shouldn't teach children [Scripture]. Rabbi Yehudah says: A single man shouldn't shepherd small cattle, and two single men shouldn't sleep in one cloak. They said: Yisrael is not suspected of such [bestiality].