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