Musannaf Ibn Abi Shayba 9:1656

Marwan ibn Mu'awiyah narrated to us, from 'Amr ibn Hamzah al-'Umari, he said: 'Abd al-Rahman ibn Sa'd, a freed slave of Abu Sufyan, narrated to us, he said: I heard Abu Sa'id al-Khudri say: The Messenger of Allah (may Allah bless him and grant him peace) said: "Indeed, among the worst of people in status before Allah on the Day of Resurrection is a man who approaches his wife and she approaches him, then he spreads her secret."