Sahih al-Bukhari, Book 67, Hadith 173 (In-Book) ⓘ
Narrated `Abdullah bin Mas`ud: The Prophet 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."
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 " .
also referenced under: Hadith 5240 (DarusSalam) & Volume 7, Book 62, Hadith 167 (USC-MSA)