Yahya related to me from Malik from Abu'n-Nadr, the mawla of Umaribn Ubaydullah from Ibn Aflah, the mawla of Abu Ayyub al-Ansari froman umm walad of Abu Ayyubal-Ansari that he practised coitusinterruptus. (IT)
USC-MSA web (English) reference: Book 29, Hadith 97 (IT)
Arabic reference (IT): Book 29, Hadith 1262 (IT)