Abu Awn narrates that Sayyiduna Abu al-Darda (may Allah be pleased with him) saw on a woman's face a mark like the knee-callus of a goat and said: It would have been much better for you if this mark were not on your face.
(b) It is narrated from Sayyiduna al-Sa'ib bin Yazid (may Allah be pleased with him) that he disapproved of it and said: By Allah, this mark is not the sign (meant in the verse).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3558