Musannaf Ibn Abi Shayba 9:1756

Shababa ibn Sawwar narrated to us, he said: Layth ibn Sa'd narrated to us, from Yazid ibn Abi Habib, from Abu al-Khayr, from Uqbah ibn Amir, that the Messenger of Allah (may Allah bless him and grant him peace) said: "Beware of entering upon women." A man from the Ansar said: "O Messenger of Allah, what about the in-law (al-hamu)?" He said: "The in-law is death."