24 Ketbot 9/4-7

(4) One who placed his wife as the shopkeeper [in his shop], or appointed her as administrator [over his property], may impose upon her an oath whenever he pleases. Rabbi Eliezer says, "Even with regard to her spindle and her dough."

(5) If he wrote to her, "I will not [impose] upon you a vow or an oath," he may not impose upon her an oath; but he may impose upon her heir an oath, as well as those who act with her authority. [If he writes to her] "I will not [impose] upon you a vow or an oath, nor on your heirs, nor on those who act with your authority," he may not impose upon her an oath, not her, nor her heirs, nor those who act with her authority. But his heirs may impose upon her an oath, her, her heirs, and those who act with her authority. [If he writes,] "I will not [impose] upon you a vow or an oath, nor will my heirs, nor will those who act with my authority, on you, on your heirs, or on those who act with your authority," [then] neither he, nor his heirs, nor those who act with his authority, may impose upon her an oath, neither her, nor her heirs, nor those who act with her authority.

(6) If she went [directly] from her husband's grave to her father's house, or if she returned to the house of her father-in-law, but did not become the administrator [of her deceased husband's property], his heirs may not impose upon her an oath. But if she did become administrator, the heirs may impose upon her an oath with regard to the future, but they may not impose upon her an oath with regard to the past.

(7) She who damages [her rights to] her ketubah, may be paid only by taking an oath. If one witness testifies about [the ketubah] that it has [already] been paid, she may be paid only by taking an oath. [If she is to be paid] from orphans’ property, or from mortgaged property, or in [the husband's] absence, she may be paid only by taking an oath.