Musnad Abu Ya'la al-Mawsili 152:64

And with his chain of narration from Abdullah, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "If you are three, then two men must not whisper to each other excluding the other, until you mingle with the people, because that saddens him. And a woman must not touch another woman and then describe her to her husband, as if he were looking at her."