It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "No woman should touch her naked body with another woman, so that she describes her physical features to her husband in such a way as if he is seeing her with his own eyes."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 3668