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." (TR)
English reference (TR): Vol. 1, Book 7, Hadith 1761 (TR)
Arabic reference (TR): Book 7, Hadith 1833 (TR)