It is narrated from Sayyiduna Abu Sa'id Zarqi that a man from the tribe of Ashja' asked the Prophet (peace be upon him) about coitus interruptus (withdrawal), and said: In fact, my wife is still breastfeeding. The Prophet (peace be upon him) said: Whatever is destined to be in the womb will certainly occur.
Hadith Referenceمسند احمد / مسند المكيين / 15732
Hadith Gradingحکم دارالسلام:صحيح بشواهده، وهذا إسناد ضعيف لجهالة عبدالله بن مرة