Ayub (may Allah have mercy on him) says that I asked Hazrat Saeed bin Jubair (may Allah have mercy on him) whether a man can look at the head of his mother-in-law. In response, he recited this verse: "And they should not display their adornment except to their husbands, their fathers-in-law, their sons, their husbands' sons, their brothers, their brothers' sons, or their sisters' sons." Then he said, "Do you see her included among them?"