Musnad Ahmad 1167:10

Abu Mu'awiyah narrated to us, he said: Hisham ibn 'Urwah narrated to us, from Fatimah bint al-Mundhir, from Asma' bint Abi Bakr, she said: A woman came to the Prophet, may Allah bless him and grant him peace, and said: "O Messenger of Allah, I have a co-wife (durrah), so is there any sin upon me if I pretend to have received from my husband what he has not given me?" The Messenger of Allah, may Allah bless him and grant him peace, said: "The one who pretends to have received what he has not been given is like one who wears two garments of falsehood."