Musnad Abu Ya'la al-Mawsili 109:256

Abu Khaythama narrated to us, Abd al-Samad narrated to us, Hisham narrated to us, from Abu al-Zubayr, from Jabir, who said: We used to practice *‘azl* (coitus interruptus) during the time of the Messenger of Allah, peace and blessings of Allah be upon him, and he did not forbid us from it.