The Prophet (ﷺ) said, "Isn't it true that a woman does not pray and does not fast on menstruating? And that is the defect (a loss) in her religion."
Sahih al-Bukhari Book 30, Hadith 58
← Previous Hadith Sometimes I missed some days of Ramadan, but could not fast in lieu of them except in the month of Sha'ban." Said Yahya, a sub-narrator, "She used to be busy serving the Prophet (ﷺ) ."

Sahih al-Bukhari Book 30, Hadith 57 Next Hadith → Allah's Messenger (ﷺ) said, "Whoever died and he ought to have fasted (the missed days of Ramadan) then his guardians must fast on his behalf."

Sahih al-Bukhari Book 30, Hadith 59