Musannaf Ibn Abi Shayba 9:693

Muhammad ibn Bishr narrated to us, from Mis'ar, from al-Walid ibn Abi Malik, from Qaza'ah, from Abu Sa'id al-Khudri, who said: "This daughter of mine, who is in the private quarters, is from [the practice of] al-'azl (coitus interruptus)."