The ruling on ghusl and intercourse when bleeding stops during menstruation

Question:
He says: Honorable Shaykh, may Allah grant you success. His wife menstruates, and her menstruation lasts for five days. On the fourth day, the bleeding stops, so he orders his wife to perform ghusl and pray, and he may have intercourse with her. Then the blood returns, either in the middle of the fourth night or in the morning of the fifth day. What is the ruling on that?

Answer:
This is a mistake, and it is not permissible. Aisha (may Allah be pleased with her) said: "Do not hasten until you see the white discharge." She should not hasten to perform ghusl, and her husband should not hasten to have intercourse, until she sees complete purity, either by the appearance of the white discharge or by complete dryness. Complete dryness is when she inserts a cotton pad and it comes out white with nothing on it; then the blood has stopped. If anything appears on it, even a little, then the blood has not stopped. So the husband should not hasten to have intercourse, and she should not hasten to perform ghusl until she sees purity, either by the appearance of the white discharge or by complete dryness.