Abu Hurairah (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "It is not lawful for a woman to observe (voluntary) fasting without the permission of her husband when he is at home; and she should not allow anyone to enter his house without his permission.".[Al-Bukhari and Muslim]. (DE)
Arabic/English book reference (DE): Book 1, Hadith 282 (DE)