It wasnarrated from Abu Hurairah that the Prophet (ﷺ) said:
"Whenherhusband is present, no woman should fast any day apart from themonthof Ramadan without his permission." (IT)
English reference (IT): Vol. 1, Book 7, Hadith 1761 (IT)
Arabic reference (IT): Book 7, Hadith 1833 (IT)