Sahih Muslim Book 8, Hadith Number 3388.
Chapter: Al-Azl (incomplete sexual intercourse): Coitus Interruptus.
Jabir (Allah be pleased with him) reported: We used to practise ‘azl during the lifetime of Allah’s Messenger (May peace be upon him). This (the news of this practise) reached Allah’s Apostle (May peace be upon him), and he did not forbid us.