Sayyiduna Jabir bin Abdullah (may Allah be pleased with him), a man of the tribe of Banu Salimah, said: A man came to the Messenger of Allah (peace and blessings be upon him) and said: "I have a slave girl with whom I practise 'azl." He (peace and blessings be upon him) said: "That will not avert the decree of Allah." After a short while he came again and said: "O Messenger of Allah, do you know that the slave girl has become pregnant?" Then the Messenger of Allah (peace and blessings be upon him) said: "I am the servant of Allah and His Messenger."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14306