Yahya related to me from Malik from Abu'n-Nadr, the mawla of Umaribn Ubaydullah from Amir ibn Sad ibn Abi Waqqas from his father thathe used to practise coitus interruptus. (ES)
USC-MSA web (English) reference: Book 29, Hadith 96 (ES)
Arabic reference (ES): Book 29, Hadith 1261 (ES)