Abd al-Rahman bin Aflah, the mawla (freed slave) of Sayyiduna Abu Ayyub (may Allah be pleased with him), narrates from the umm walad of Sayyiduna Abu Ayyub (may Allah be pleased with him) that he used to practise 'azl.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14318