Ten genealogical classes went up from Babylonia [in the time of Ezra and Nehemiah]: Priests, Levites, Israelites, halalim, converts, freed slaves, mamzerim, netinim, hushlings and foundlings. Priests, Levites and Israelites may marry each other. Levites, Israelites, halalim, converts, and freed slaves may marry each other. Converts, freed slaves, mamzerim and netinim, hushlings and foundlings, may marry each other.

These are they: a hushling (shtuki): he who knows who his mother is but not his father; A foundling (asufi): he who was gathered in from the marketplace and knows neither his father nor his mother. Abba Saul used to call the hushling (shtuki), “checked one” (b’duki).

All who are forbidden to enter into the assembly may intermarry with each other. Rabbi Judah forbids it. Rabbi Eliezer says: those who are certain [may marry] those who are certain, but those who are certain with those who are doubtful and those who are doubtful with those who are certain and those who are doubtful with others who are doubtful this is prohibited. Who are “those who are doubtful”? The shtuki, the asufi and the Samaritan.

He who marries a the daughter of a priest must investigate her lineage up to four mothers, which are eight: her mother and her mother’s mother, her mother’s father’s mother and her mother, her father’s mother and her mother, her father’s father’s mother and her mother. [In the case of] the daughter of a Levite or an Israelite, one more is added.

They do not check from the altar and upwards, nor from the duchan [dais] and upwards, nor from the Sanhedrin and upwards. And all those whose fathers were established to have been among the public officers or charity collectors may marry [their daughters] into the priesthood, and he doesn’t need to check after them. Rabbi Yose says: even one who was signed as a witness in the old court of Tzippori. Rabbi Hanina ben Antigonus says: even one who was recorded in the king’s list of officers.

The daughter of a male halal is unfit for the priesthood for all time. If an Israelite marries a halalah, his daughter is fit for the priesthood. If a halal marries the daughter of an Israelite, his daughter is unfit for the priesthood. Rabbi Judah says: the daughter of a male convert is as the daughter of a male halal.

Rabbi Eliezer ben Jacob says: if an Israelite marries a female convert, his daughter is fit for the priesthood, and if a male convert marries the daughter of an Israelite, his daughter is fit for the priesthood. But if a male convert marries a female convert, his daughter is unfit for the priesthood. [The same law applies to] a convert as to freed slaves, even for ten generations, [his daughter is unfit] unless his mother is of Israelite stock. Rabbi Yose says: even if a male convert marries a female convert, his daughter is fit for the priesthood.

If a man declares, “this son of mine is a mamzer,” he is not believed. And even if both [the husband and wife] say about the fetus inside her, “it’s a mamzer” they are not believed. Rabbi Judah says: they are believed.

If a man went overseas together with his wife, and then he, his wife, and his children returned, and he said, “Behold, this is she [who went with me overseas,] and these are her children”, he need not bring proof with regard to the woman or the children. [If he declares,] “She died [abroad] and these are her children,” he must bring proof with regard to the children, but not with regard to the woman.

[If he says,] “I married a woman overseas, and behold, this is she, and these are her children”, he must bring proof about the woman, but not about the children. [If he says,] “She died, and these are her children”, he must bring proof about the woman and about the children.

A man may not be alone with two women, but one woman may be alone with two men. Rabbi Shimon says: even one man may be alone with two women, if his wife is with him, and he may sleep with them in an inn, because his wife watches him. A man may be alone with his mother and his daughter, and he may sleep with them in immediate bodily contact; but when they grow up, she must sleep in her garment and he in his.

An unmarried man must not learn to be a scribe, nor may a woman learn to be a scribe. Rabbi Eliezer says: even one who has no wife should not learn to be a scribe.

Rabbi Judah said: an unmarried man must not tend cattle, nor may two unmarried men sleep together under the same cover. But the sages permit it. One whose business is with women must not be alone with women. And one should not teach his son a woman’s trade. Rabbi Meir says: one should always teach his son a clean and easy profession, and pray to Him to whom wealth and property belong. For a profession does not contain [the potential for] poverty and wealth, for poverty is not due to one’s profession nor is wealth due to the profession, but all depends on merit. Rabbi Shimon ben Elazar says: have you ever seen a wild beast or a bird with a profession? Yet they are sustained without trouble. Now, were they not created only to serve me, while I was created to serve my master: surely then I should make a living without trouble! But my evil acts have done me in and withheld my livelihood. Abba Gurion a man of Sidon says in the name of Abba Guria: one should not teach his son [to be] a donkey-driver, camel-driver, wagon-driver, sailor, shepherd, or shopkeeper, because their profession is the profession of robbers. Rabbi Judah says in his name: most donkey-drivers are wicked, while most camel-drivers are worthy men; and most sailors are pious. The best of doctors are destined for Gehenna, and the worthiest of butchers is Amalek’s partner. Rabbi Nehorai says: I will abandon every profession in the world and I will not teach my son anything but Torah, for a person enjoys its reward in this world while the principal remains for him in the world to come. But all other professions are not so; for when a man comes to sickness or old age or suffering and cannot engage in his profession, he must die of starvation, whereas the Torah is not so, for it guards him from all evil in his youth and gives him a future and hope in his old age. Of his youth what is said? “But they that wait upon the Lord shall renew their strength” (Isaiah 40:31). Of his old age what is said? “They shall still bring forth fruit in old age” (Psalms 92:15). And it is also said of our father Abraham, “And Abraham was old … And the Lord blessed Abraham with everything” (Genesis 24:1). We find that Abraham our father observed the whole Torah before it was given, for it is said, “Because Abraham obeyed My voice, and kept My charge, My commandments, My statutes, and My laws” (Genesis 26:5).