Sahih al-Bukhari 5240
Sahih al-Bukhari · Book 67: Wedlock, Marriage (Nikaah) · A woman should not look at or touch the body of another woman to describe to her husband
Narrated `Abdullah bin Mas`ud:
حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ ، حَدَّثَنَا سُفْيَانُ ، عَنْ مَنْصُورٍ ، عَنْ أَبِي وَائِلٍ ، عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " لاَ تُبَاشِرِ الْمَرْأَةُ الْمَرْأَةَ فَتَنْعَتَهَا لِزَوْجِهَا، كَأَنَّهُ يَنْظُرُ إِلَيْهَا " .
The Prophet (ﷺ) said, "A woman should not look at or touch another woman to describe her to her husband in such a way as if he was actually looking at her."