Numbers 30:13 (BSB)

Her husband may confirm or nullify any vow or any sworn pledge to deny herself.

From Numbers 30. Also in the ESV.

Commentary on Numbers 30:13

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Numbers 30:3-16: It is here taken for granted that all such persons as are sui juris - at their own disposal, and are likewise of sound understanding and memory, are bound to perform whatever they vow that is lawful and possible; but, if the person vowing be under the dominion and at the disposal of another, the case is different. Two cases much alike are here put and determined: - I.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 30:13: Every vow, and every binding oath to afflict the soul,.... By fasting, as Aben Ezra observes; as when a vow was made, or a person bound herself by an oath to abstain from such and such food, or to fast on such a day; to keep a fast which was not appointed, to set apart a day for fasting, besides the grand and general fast...
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on Numbers 30:13: Every vow, and every binding oath to afflict the soul, her husband may establish it, or her husband may make it void. (h) To mortify herself by abstinence or other bodily exercise.