Musannaf Ibn Abi Shayba 9:684

Abdah narrated to us, from Yahya bin Sa'id, from Sa'id bin al-Musayyib, who said: The Ansar did not see any harm in *al-'azl* (coitus interruptus). And among those who used to say that were Zayd, Abu Ayyub, and Ubayy.