Musnad Abu Ya'la al-Mawsili 152:15

Narrated to us Muhriz ibn 'Awn, narrated to us 'Ali ibn Mushir, from al-A'mash, from Shaqiq, from 'Abdullah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "A woman should not associate with (another) woman and then describe her to her husband, as if he were looking at her."