Дварим 27:21 Галаха: Shulchan Arukh, Even HaEzer & Kitzur Shulchan Arukh

Israelite man should always make an effort to marry a scholar's daughter and to marry his daughter to a scholar. If he can't find a daughter of a scholar he marries the daughter of a gedolei hador (great Rabbi) and he can't find a gedolei hador he marries the daughter of one of the heads of the congregations and if he can't find one of the heads of congregations he marries a collector of Tzedakah and if he he can't find that he marries a school teacher but his daughter should not marry an am haaretz (simpleton). [Isserless: Pertaining to their daughters he says, cursed is the one that lies with beasts and all this pertains to the am haaretz because they are not diligent with the mitzvot. But its a mitzvah for a man to marry the daughter of his sister and there are those who say even the daughter of his brother].

A woman should be modest about her immersion, and conceal the date of her immersion. She should not go to the (mikvah) when people are about. [She should arrange it] so that people will not notice her. Concerning a woman who does not act modestly, it is said, "Cursed be he who lies with any kind of animal."¹⁴Deuteronomy 27:21. She should also take care when leaving the (mikvah) that her friend should meet her and touch her, so that she not be met first by an unclean thing such as a dog, a donkey, a pig, a horse, a metzorah, or similar things, or by a person, ignorant in Torah, and not God-fearing or a non-Jew. If any of these meet her (first), if she is God-fearing, she will return and immerse again. If one meets a woman leaving the (mikvah) after her immersion, he may expect some mishap, God forbid. To prevent this he should recite these two verses: "He pours contempt upon nobles and causes them to wander, in the wasteland, where there is no path"¹⁵Psalms 107:40. and, "He pours contempt upon nobles and he loosens the belt of the mighty."¹⁶Job 12:21.