Mishnah Ketubot 7:3–7 (with Nedarim 11) — Sefaria version 'Mishnah Yomit by Dr. Joshua Kulp' (CC-BY; source: learn.conservativeyeshiva.org) (CC BY)
If a man forbade his wife by vow that she should not adorn herself with any type of adornment he must divorce her and give her the ketubah. Rabbi Yose says: [this refers] to poor women if no time limit is given, and to rich women [if the time limit is] thirty days.
If a man forbade his wife by vow that she may not go to her father’s house: --When the father lives with her in the same town, the husband may retain [her as his wife, if the prohibition was for] one month; but if for two months he must divorce her and give her the ketubah. --When the father lives in another town, the husband may retain [her as his wife, if the prohibition was for] one festival, but if for three festivals, he must divorce her and give her the ketubah.
If a man forbade his wife by vow from visiting a house of mourning or a house of feasting, he must divorce her and give her the ketubah, because he has closed [peoples doors] against her. If he claims [that his vow] was due to some other cause he is permitted [to forbid her]. If he said to her: “[There shall be no prohibition] provided you tell so-and-so what you have told me” or “what I have told you” or “that you will fill and pour out in the garbage”, he must divorce her and give her the ketubah.
These leave [their marriage] without their ketubah: A wife who transgresses the law of Moses or Jewish law. And what is the law of Moses? Feeding her husband with untithed food, having intercourse with him while in the period of her menstruation, not separating dough offering, or making vows and not fulfilling them. And what is Jewish practice? Going out with her head uncovered, spinning wool in the marketplace or conversing with every man. Abba Shaul says: also one who curses her husband’s parents in his presence. Rabbi Tarfon says: also one who has a loud voice. And who is regarded as one who has a loud voice? A woman whose voice can be heard by her neighbors when she speaks inside her house.
If a man betrothed a woman on condition that she was under no vows and she was found to be under vows, she is not betrothed. If he married her without making any conditions and she was found to be under vows, she leaves without her ketubah. [If a woman was betrothed] on condition that she has no bodily defects, and she was found to have defects, she is not betrothed. If he married her without making any conditions and she was found to have defects, she leaves without her ketubah. All defects which disqualify priests also disqualify women.
Reproduced in full. Translation: Sefaria version 'Mishnah Yomit by Dr. Joshua Kulp' (CC-BY; source: learn.conservativeyeshiva.org) (CC BY).
Why Pitre cites it
Married men and women taking vows to abstain from ordinary marital relations, so common that excessive vows could be grounds for divorce — Pitre's Mishnaic evidence for such vows.
Notes
Five paragraphs = mishnayot 7:3, 7:4, 7:5, 7:6, 7:7 in order (7:3–5: husband's vows restricting the wife -> 'he must divorce her and give her the ketubah'; 7:6: women divorced without ketubah incl. 'making vows and not fulfilling them'; 7:7: betrothal on condition of no vows/defects). Other versions available: Davidson/Steinsaltz (CC-BY-NC), 'Eighteen Treatises from the Mishnah' (PD), Silverstein/Bartenura (CC-BY).