Surah Al-Baqarah — Ayah 222 (2:222)

English translation (Saheeh International)

And they ask you about menstruation. Say, "It is harm, so keep away from wives¹ during menstruation. And do not approach them until they are pure. And when they have purified themselves,² then come to them from where Allāh has ordained for you. Indeed, Allāh loves those who are constantly repentant and loves those who purify themselves."

1. i.e., refrain from sexual intercourse.
2. By taking a complete bath (ghusl) .

Brief commentary

O Prophet! Your Companions ask you about menses (which is the blood of menstruation that naturally comes out of the womb at certain times of the month). Say in reply to them: Menses is harmful to the man and woman, so avoid sexual intercourse during this time. Do not approach them for sexual intercourse until the blood stops and they have cleaned themselves by taking a bath. If the blood has stopped and they have cleaned themselves, then you may have sexual intercourse with them through the vagina in the manner that Allah has permitted for you. Allah loves those that frequently repent from their sins and are extra mindful of cleanliness.