It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that an Ansari man came to the service of the Prophet (peace and blessings be upon him) and said: "I have a slave girl who serves us and also brings water. At night, I go to her and practice coitus interruptus, yet she has given birth to a child." The Prophet (peace and blessings be upon him) said: "The soul that Allah has decided to create will surely be created."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14362