Silsilat al-Ahadith al-Sahihah

Sayyiduna Abu Sa‘id Zarqi (may Allah be pleased with him) says: A man asked the Prophet (peace and blessings of Allah be upon him) about ‘azl (withdrawal), saying: My wife is still breastfeeding, and I do not want her to become pregnant (so can I practice ‘azl)? The Prophet (peace and blessings of Allah be upon him) said: “Whatever has been decreed in fate regarding the womb will surely come to pass.”