Do the texts of Islamic law prohibit family planning?

Contraception was known in ancient times, though it was largely limited to coitus interruptus, that is, withdrawal before ejaculation to avoid pregnancy. It was reported from the Companions that they practiced coitus interruptus during the lifetime of the Prophet (peace and blessings be upon him), and when he became aware of it, he did not prohibit it. Jabir Ibn Abdullah (may Allah be pleased with him) said, “We practiced coitus interruptus during the lifetime of the Prophet, peace and blessings be upon him. This came to his attention, and did not prohibit it” (recorded in the Sahih collections of Bukhari and Muslim, with the wording as recorded by Muslim).

In another narration, Jabir (may Allah be pleased with him), said, “A man came to the Messenger of Allah, peace and blessings be upon him, and said, ‘I have a female slave who serves us. I am intimate with her but do not want her to become pregnant.’ The Prophet said, ‘You may practice withdrawal with her if you wish, for what is destined for her will come to pass.’ Sometime later, the man returned and said, ‘The slave-girl is pregnant.’  The Prophet replied, ‘I told you, what is destined for her will come to pass’” (recorded by Muslim). The Prophet’s words, “You may practice withdrawal with her if you wish,” clearly indicate that the practice was permissible, even though the context might suggest otherwise. See: Fath Al-Bari (9:306).

Based on the above, the texts and principles of Islamic law do not prohibit family planning. This conclusion is drawn by analogy to the practice that was observed during the time of the Prophet (peace and blessings be upon him).

And Allah Almighty knows best.